Home / 20,812.80-31,223.20-8,966.40

Finding the Fourth Proportional to 20,812.80, 31,223.20 and 8,966.40

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Solution

The fourth proportional to 20,812.80, 31,223.20 and 8,966.40 is: 13,451.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.80 : 31,223.20 = 8,966.40 : x
  2. Step 2: Convert to fraction form
    20,812.80/31,223.20 = 8,966.40/x
  3. Step 3: Cross multiply
    20,812.80x = 31,223.20 × 8,966.40
  4. Step 4: Simplify right side
    20,812.80x = 279,959,700.48
  5. Step 5: Solve for x
    x = 279,959,700.48/20,812.80
  6. Step 6: Final answer
    x = 13,451.32

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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.