Home / 8,988.70-12,399.60-5,451.16

Finding the Fourth Proportional to 8,988.70, 12,399.60 and 5,451.16

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Solution

The fourth proportional to 8,988.70, 12,399.60 and 5,451.16 is: 7,519.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,988.70 : 12,399.60 = 5,451.16 : x
  2. Step 2: Convert to fraction form
    8,988.70/12,399.60 = 5,451.16/x
  3. Step 3: Cross multiply
    8,988.70x = 12,399.60 × 5,451.16
  4. Step 4: Simplify right side
    8,988.70x = 67,592,203.54
  5. Step 5: Solve for x
    x = 67,592,203.54/8,988.70
  6. Step 6: Final answer
    x = 7,519.69

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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.