Home / 39,157.72-54,037.10-21,252.76

Finding the Fourth Proportional to 39,157.72, 54,037.10 and 21,252.76

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Solution

The fourth proportional to 39,157.72, 54,037.10 and 21,252.76 is: 29,328.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,157.72 : 54,037.10 = 21,252.76 : x
  2. Step 2: Convert to fraction form
    39,157.72/54,037.10 = 21,252.76/x
  3. Step 3: Cross multiply
    39,157.72x = 54,037.10 × 21,252.76
  4. Step 4: Simplify right side
    39,157.72x = 1,148,437,517.40
  5. Step 5: Solve for x
    x = 1,148,437,517.40/39,157.72
  6. Step 6: Final answer
    x = 29,328.51

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Half scale
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Double scale
Find fourth proportional to 39,158.72, 54,038.48 and 21,253.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.