Home / 8,123.40-12,156.30-5,646.60

Finding the Fourth Proportional to 8,123.40, 12,156.30 and 5,646.60

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Solution

The fourth proportional to 8,123.40, 12,156.30 and 5,646.60 is: 8,449.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,123.40 : 12,156.30 = 5,646.60 : x
  2. Step 2: Convert to fraction form
    8,123.40/12,156.30 = 5,646.60/x
  3. Step 3: Cross multiply
    8,123.40x = 12,156.30 × 5,646.60
  4. Step 4: Simplify right side
    8,123.40x = 68,641,763.58
  5. Step 5: Solve for x
    x = 68,641,763.58/8,123.40
  6. Step 6: Final answer
    x = 8,449.88

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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.