Home / 8,518.40-11,731.20-6,156.80

Finding the Fourth Proportional to 8,518.40, 11,731.20 and 6,156.80

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Solution

The fourth proportional to 8,518.40, 11,731.20 and 6,156.80 is: 8,478.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,518.40 : 11,731.20 = 6,156.80 : x
  2. Step 2: Convert to fraction form
    8,518.40/11,731.20 = 6,156.80/x
  3. Step 3: Cross multiply
    8,518.40x = 11,731.20 × 6,156.80
  4. Step 4: Simplify right side
    8,518.40x = 72,226,652.16
  5. Step 5: Solve for x
    x = 72,226,652.16/8,518.40
  6. Step 6: Final answer
    x = 8,478.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.