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Finding the Fourth Proportional to 15,079.92, 20,809.35 and 9,108.06

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Solution

The fourth proportional to 15,079.92, 20,809.35 and 9,108.06 is: 12,568.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,079.92 : 20,809.35 = 9,108.06 : x
  2. Step 2: Convert to fraction form
    15,079.92/20,809.35 = 9,108.06/x
  3. Step 3: Cross multiply
    15,079.92x = 20,809.35 × 9,108.06
  4. Step 4: Simplify right side
    15,079.92x = 189,532,808.36
  5. Step 5: Solve for x
    x = 189,532,808.36/15,079.92
  6. Step 6: Final answer
    x = 12,568.56

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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.