Home / 10,949.80-16,400.40-8,471.20

Finding the Fourth Proportional to 10,949.80, 16,400.40 and 8,471.20

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Solution

The fourth proportional to 10,949.80, 16,400.40 and 8,471.20 is: 12,688.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,949.80 : 16,400.40 = 8,471.20 : x
  2. Step 2: Convert to fraction form
    10,949.80/16,400.40 = 8,471.20/x
  3. Step 3: Cross multiply
    10,949.80x = 16,400.40 × 8,471.20
  4. Step 4: Simplify right side
    10,949.80x = 138,931,068.48
  5. Step 5: Solve for x
    x = 138,931,068.48/10,949.80
  6. Step 6: Final answer
    x = 12,688.00

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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.