Home / 39,715.76-54,805.60-21,813.12

Finding the Fourth Proportional to 39,715.76, 54,805.60 and 21,813.12

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Solution

The fourth proportional to 39,715.76, 54,805.60 and 21,813.12 is: 30,100.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,715.76 : 54,805.60 = 21,813.12 : x
  2. Step 2: Convert to fraction form
    39,715.76/54,805.60 = 21,813.12/x
  3. Step 3: Cross multiply
    39,715.76x = 54,805.60 × 21,813.12
  4. Step 4: Simplify right side
    39,715.76x = 1,195,481,129.47
  5. Step 5: Solve for x
    x = 1,195,481,129.47/39,715.76
  6. Step 6: Final answer
    x = 30,100.93

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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.