Home / 28,225.60-42,338.40-8,507.20

Finding the Fourth Proportional to 28,225.60, 42,338.40 and 8,507.20

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Solution

The fourth proportional to 28,225.60, 42,338.40 and 8,507.20 is: 12,760.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,225.60 : 42,338.40 = 8,507.20 : x
  2. Step 2: Convert to fraction form
    28,225.60/42,338.40 = 8,507.20/x
  3. Step 3: Cross multiply
    28,225.60x = 42,338.40 × 8,507.20
  4. Step 4: Simplify right side
    28,225.60x = 360,181,236.48
  5. Step 5: Solve for x
    x = 360,181,236.48/28,225.60
  6. Step 6: Final answer
    x = 12,760.80

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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.