Home / 15,432-21,287.04-10,128.96

Finding the Fourth Proportional to 15,432, 21,287.04 and 10,128.96

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Solution

The fourth proportional to 15,432, 21,287.04 and 10,128.96 is: 13,971.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,432 : 21,287.04 = 10,128.96 : x
  2. Step 2: Convert to fraction form
    15,432/21,287.04 = 10,128.96/x
  3. Step 3: Cross multiply
    15,432x = 21,287.04 × 10,128.96
  4. Step 4: Simplify right side
    15,432x = 215,615,576.68
  5. Step 5: Solve for x
    x = 215,615,576.68/15,432
  6. Step 6: Final answer
    x = 13,971.98

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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.