Home / 10,084.60-15,129.48-7,128.91

Finding the Fourth Proportional to 10,084.60, 15,129.48 and 7,128.91

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Solution

The fourth proportional to 10,084.60, 15,129.48 and 7,128.91 is: 10,695.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,084.60 : 15,129.48 = 7,128.91 : x
  2. Step 2: Convert to fraction form
    10,084.60/15,129.48 = 7,128.91/x
  3. Step 3: Cross multiply
    10,084.60x = 15,129.48 × 7,128.91
  4. Step 4: Simplify right side
    10,084.60x = 107,856,701.27
  5. Step 5: Solve for x
    x = 107,856,701.27/10,084.60
  6. Step 6: Final answer
    x = 10,695.19

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1.5x scale

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.