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Finding the Fourth Proportional to 8,700.72, 13,051.08 and 2,126.90

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Solution

The fourth proportional to 8,700.72, 13,051.08 and 2,126.90 is: 3,190.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,700.72 : 13,051.08 = 2,126.90 : x
  2. Step 2: Convert to fraction form
    8,700.72/13,051.08 = 2,126.90/x
  3. Step 3: Cross multiply
    8,700.72x = 13,051.08 × 2,126.90
  4. Step 4: Simplify right side
    8,700.72x = 27,758,276.80
  5. Step 5: Solve for x
    x = 27,758,276.80/8,700.72
  6. Step 6: Final answer
    x = 3,190.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.