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Finding the Fourth Proportional to 12,987.88, 19,476.06 and 8,057.32

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Solution

The fourth proportional to 12,987.88, 19,476.06 and 8,057.32 is: 12,082.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,987.88 : 19,476.06 = 8,057.32 : x
  2. Step 2: Convert to fraction form
    12,987.88/19,476.06 = 8,057.32/x
  3. Step 3: Cross multiply
    12,987.88x = 19,476.06 × 8,057.32
  4. Step 4: Simplify right side
    12,987.88x = 156,924,847.76
  5. Step 5: Solve for x
    x = 156,924,847.76/12,987.88
  6. Step 6: Final answer
    x = 12,082.41

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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.