Home / 30,105.60-45,158.40-9,331.20

Finding the Fourth Proportional to 30,105.60, 45,158.40 and 9,331.20

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Solution

The fourth proportional to 30,105.60, 45,158.40 and 9,331.20 is: 13,996.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,105.60 : 45,158.40 = 9,331.20 : x
  2. Step 2: Convert to fraction form
    30,105.60/45,158.40 = 9,331.20/x
  3. Step 3: Cross multiply
    30,105.60x = 45,158.40 × 9,331.20
  4. Step 4: Simplify right side
    30,105.60x = 421,382,062.08
  5. Step 5: Solve for x
    x = 421,382,062.08/30,105.60
  6. Step 6: Final answer
    x = 13,996.80

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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.