Home / 18,478.40-27,717.60-5,331.20

Finding the Fourth Proportional to 18,478.40, 27,717.60 and 5,331.20

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Solution

The fourth proportional to 18,478.40, 27,717.60 and 5,331.20 is: 7,996.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,478.40 : 27,717.60 = 5,331.20 : x
  2. Step 2: Convert to fraction form
    18,478.40/27,717.60 = 5,331.20/x
  3. Step 3: Cross multiply
    18,478.40x = 27,717.60 × 5,331.20
  4. Step 4: Simplify right side
    18,478.40x = 147,768,069.12
  5. Step 5: Solve for x
    x = 147,768,069.12/18,478.40
  6. Step 6: Final answer
    x = 7,996.80

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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.