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Finding the Fourth Proportional to 14,987.92, 20,679.96 and 8,700.16

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Solution

The fourth proportional to 14,987.92, 20,679.96 and 8,700.16 is: 12,004.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,987.92 : 20,679.96 = 8,700.16 : x
  2. Step 2: Convert to fraction form
    14,987.92/20,679.96 = 8,700.16/x
  3. Step 3: Cross multiply
    14,987.92x = 20,679.96 × 8,700.16
  4. Step 4: Simplify right side
    14,987.92x = 179,918,960.79
  5. Step 5: Solve for x
    x = 179,918,960.79/14,987.92
  6. Step 6: Final answer
    x = 12,004.26

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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.