Home / 21,536.28-29,719.65-13,152.78

Finding the Fourth Proportional to 21,536.28, 29,719.65 and 13,152.78

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Solution

The fourth proportional to 21,536.28, 29,719.65 and 13,152.78 is: 18,150.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,536.28 : 29,719.65 = 13,152.78 : x
  2. Step 2: Convert to fraction form
    21,536.28/29,719.65 = 13,152.78/x
  3. Step 3: Cross multiply
    21,536.28x = 29,719.65 × 13,152.78
  4. Step 4: Simplify right side
    21,536.28x = 390,896,018.13
  5. Step 5: Solve for x
    x = 390,896,018.13/21,536.28
  6. Step 6: Final answer
    x = 18,150.58

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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.