Home / 21,528.32-29,705.28-13,147.52

Finding the Fourth Proportional to 21,528.32, 29,705.28 and 13,147.52

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Solution

The fourth proportional to 21,528.32, 29,705.28 and 13,147.52 is: 18,141.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,528.32 : 29,705.28 = 13,147.52 : x
  2. Step 2: Convert to fraction form
    21,528.32/29,705.28 = 13,147.52/x
  3. Step 3: Cross multiply
    21,528.32x = 29,705.28 × 13,147.52
  4. Step 4: Simplify right side
    21,528.32x = 390,550,762.91
  5. Step 5: Solve for x
    x = 390,550,762.91/21,528.32
  6. Step 6: Final answer
    x = 18,141.26

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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.