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Finding the Fourth Proportional to 15,009.87, 20,714.60 and 9,966.19

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Solution

The fourth proportional to 15,009.87, 20,714.60 and 9,966.19 is: 13,753.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,009.87 : 20,714.60 = 9,966.19 : x
  2. Step 2: Convert to fraction form
    15,009.87/20,714.60 = 9,966.19/x
  3. Step 3: Cross multiply
    15,009.87x = 20,714.60 × 9,966.19
  4. Step 4: Simplify right side
    15,009.87x = 206,445,639.37
  5. Step 5: Solve for x
    x = 206,445,639.37/15,009.87
  6. Step 6: Final answer
    x = 13,753.99

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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.