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Finding the Fourth Proportional to 12,057.61, 18,114.13 and 8,507.90

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Solution

The fourth proportional to 12,057.61, 18,114.13 and 8,507.90 is: 12,781.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,057.61 : 18,114.13 = 8,507.90 : x
  2. Step 2: Convert to fraction form
    12,057.61/18,114.13 = 8,507.90/x
  3. Step 3: Cross multiply
    12,057.61x = 18,114.13 × 8,507.90
  4. Step 4: Simplify right side
    12,057.61x = 154,113,116.06
  5. Step 5: Solve for x
    x = 154,113,116.06/12,057.61
  6. Step 6: Final answer
    x = 12,781.40

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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.