Home / 13,431-20,132.10-6,490.20

Finding the Fourth Proportional to 13,431, 20,132.10 and 6,490.20

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Solution

The fourth proportional to 13,431, 20,132.10 and 6,490.20 is: 9,728.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,431 : 20,132.10 = 6,490.20 : x
  2. Step 2: Convert to fraction form
    13,431/20,132.10 = 6,490.20/x
  3. Step 3: Cross multiply
    13,431x = 20,132.10 × 6,490.20
  4. Step 4: Simplify right side
    13,431x = 130,661,355.42
  5. Step 5: Solve for x
    x = 130,661,355.42/13,431
  6. Step 6: Final answer
    x = 9,728.34

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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.