Home / 39,438.17-54,424.40-21,533.12

Finding the Fourth Proportional to 39,438.17, 54,424.40 and 21,533.12

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Solution

The fourth proportional to 39,438.17, 54,424.40 and 21,533.12 is: 29,715.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,438.17 : 54,424.40 = 21,533.12 : x
  2. Step 2: Convert to fraction form
    39,438.17/54,424.40 = 21,533.12/x
  3. Step 3: Cross multiply
    39,438.17x = 54,424.40 × 21,533.12
  4. Step 4: Simplify right side
    39,438.17x = 1,171,927,326.02
  5. Step 5: Solve for x
    x = 1,171,927,326.02/39,438.17
  6. Step 6: Final answer
    x = 29,715.56

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Half scale
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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.