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Finding the Fourth Proportional to 10,957.80, 16,412.40 and 8,479.20

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Solution

The fourth proportional to 10,957.80, 16,412.40 and 8,479.20 is: 12,700.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,957.80 : 16,412.40 = 8,479.20 : x
  2. Step 2: Convert to fraction form
    10,957.80/16,412.40 = 8,479.20/x
  3. Step 3: Cross multiply
    10,957.80x = 16,412.40 × 8,479.20
  4. Step 4: Simplify right side
    10,957.80x = 139,164,022.08
  5. Step 5: Solve for x
    x = 139,164,022.08/10,957.80
  6. Step 6: Final answer
    x = 12,700.00

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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.