Home / 21,618.64-32,329.14-15,715.36

Finding the Fourth Proportional to 21,618.64, 32,329.14 and 15,715.36

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Solution

The fourth proportional to 21,618.64, 32,329.14 and 15,715.36 is: 23,501.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,618.64 : 32,329.14 = 15,715.36 : x
  2. Step 2: Convert to fraction form
    21,618.64/32,329.14 = 15,715.36/x
  3. Step 3: Cross multiply
    21,618.64x = 32,329.14 × 15,715.36
  4. Step 4: Simplify right side
    21,618.64x = 508,064,073.59
  5. Step 5: Solve for x
    x = 508,064,073.59/21,618.64
  6. Step 6: Final answer
    x = 23,501.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.