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Finding the Fourth Proportional to 8,701.60, 13,090.80 and 8,156.32

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Solution

The fourth proportional to 8,701.60, 13,090.80 and 8,156.32 is: 12,270.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,701.60 : 13,090.80 = 8,156.32 : x
  2. Step 2: Convert to fraction form
    8,701.60/13,090.80 = 8,156.32/x
  3. Step 3: Cross multiply
    8,701.60x = 13,090.80 × 8,156.32
  4. Step 4: Simplify right side
    8,701.60x = 106,772,753.86
  5. Step 5: Solve for x
    x = 106,772,753.86/8,701.60
  6. Step 6: Final answer
    x = 12,270.47

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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.