Home / 8,070.40-12,105.60-7,487.20

Finding the Fourth Proportional to 8,070.40, 12,105.60 and 7,487.20

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Solution

The fourth proportional to 8,070.40, 12,105.60 and 7,487.20 is: 11,230.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,070.40 : 12,105.60 = 7,487.20 : x
  2. Step 2: Convert to fraction form
    8,070.40/12,105.60 = 7,487.20/x
  3. Step 3: Cross multiply
    8,070.40x = 12,105.60 × 7,487.20
  4. Step 4: Simplify right side
    8,070.40x = 90,637,048.32
  5. Step 5: Solve for x
    x = 90,637,048.32/8,070.40
  6. Step 6: Final answer
    x = 11,230.80

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Similar ratio
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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.