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Finding the Fourth Proportional to 15,060.14, 20,785.90 and 8,690.84

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Solution

The fourth proportional to 15,060.14, 20,785.90 and 8,690.84 is: 11,995.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,060.14 : 20,785.90 = 8,690.84 : x
  2. Step 2: Convert to fraction form
    15,060.14/20,785.90 = 8,690.84/x
  3. Step 3: Cross multiply
    15,060.14x = 20,785.90 × 8,690.84
  4. Step 4: Simplify right side
    15,060.14x = 180,646,931.16
  5. Step 5: Solve for x
    x = 180,646,931.16/15,060.14
  6. Step 6: Final answer
    x = 11,995.04

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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.