Home / 12,972.72-19,439.16-8,740.20

Finding the Fourth Proportional to 12,972.72, 19,439.16 and 8,740.20

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Solution

The fourth proportional to 12,972.72, 19,439.16 and 8,740.20 is: 13,096.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,972.72 : 19,439.16 = 8,740.20 : x
  2. Step 2: Convert to fraction form
    12,972.72/19,439.16 = 8,740.20/x
  3. Step 3: Cross multiply
    12,972.72x = 19,439.16 × 8,740.20
  4. Step 4: Simplify right side
    12,972.72x = 169,902,146.23
  5. Step 5: Solve for x
    x = 169,902,146.23/12,972.72
  6. Step 6: Final answer
    x = 13,096.88

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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.