Home / 39,459.15-54,454.95-21,555.82

Finding the Fourth Proportional to 39,459.15, 54,454.95 and 21,555.82

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Solution

The fourth proportional to 39,459.15, 54,454.95 and 21,555.82 is: 29,747.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,459.15 : 54,454.95 = 21,555.82 : x
  2. Step 2: Convert to fraction form
    39,459.15/54,454.95 = 21,555.82/x
  3. Step 3: Cross multiply
    39,459.15x = 54,454.95 × 21,555.82
  4. Step 4: Simplify right side
    39,459.15x = 1,173,821,168.38
  5. Step 5: Solve for x
    x = 1,173,821,168.38/39,459.15
  6. Step 6: Final answer
    x = 29,747.76

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Double scale
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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.