Home / 15,375.60-21,211.20-9,717.48

Finding the Fourth Proportional to 15,375.60, 21,211.20 and 9,717.48

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Solution

The fourth proportional to 15,375.60, 21,211.20 and 9,717.48 is: 13,405.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,375.60 : 21,211.20 = 9,717.48 : x
  2. Step 2: Convert to fraction form
    15,375.60/21,211.20 = 9,717.48/x
  3. Step 3: Cross multiply
    15,375.60x = 21,211.20 × 9,717.48
  4. Step 4: Simplify right side
    15,375.60x = 206,119,411.78
  5. Step 5: Solve for x
    x = 206,119,411.78/15,375.60
  6. Step 6: Final answer
    x = 13,405.62

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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.