Home / 7,385.60-11,068.80-5,331.20

Finding the Fourth Proportional to 7,385.60, 11,068.80 and 5,331.20

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Solution

The fourth proportional to 7,385.60, 11,068.80 and 5,331.20 is: 7,989.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,385.60 : 11,068.80 = 5,331.20 : x
  2. Step 2: Convert to fraction form
    7,385.60/11,068.80 = 5,331.20/x
  3. Step 3: Cross multiply
    7,385.60x = 11,068.80 × 5,331.20
  4. Step 4: Simplify right side
    7,385.60x = 59,009,986.56
  5. Step 5: Solve for x
    x = 59,009,986.56/7,385.60
  6. Step 6: Final answer
    x = 7,989.87

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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.