Home / 21,533.28-29,715.51-13,149.78

Finding the Fourth Proportional to 21,533.28, 29,715.51 and 13,149.78

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Solution

The fourth proportional to 21,533.28, 29,715.51 and 13,149.78 is: 18,146.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,533.28 : 29,715.51 = 13,149.78 : x
  2. Step 2: Convert to fraction form
    21,533.28/29,715.51 = 13,149.78/x
  3. Step 3: Cross multiply
    21,533.28x = 29,715.51 × 13,149.78
  4. Step 4: Simplify right side
    21,533.28x = 390,752,419.09
  5. Step 5: Solve for x
    x = 390,752,419.09/21,533.28
  6. Step 6: Final answer
    x = 18,146.44

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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.