Home / 10,359.20-15,538.80-7,767.20

Finding the Fourth Proportional to 10,359.20, 15,538.80 and 7,767.20

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Solution

The fourth proportional to 10,359.20, 15,538.80 and 7,767.20 is: 11,650.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,359.20 : 15,538.80 = 7,767.20 : x
  2. Step 2: Convert to fraction form
    10,359.20/15,538.80 = 7,767.20/x
  3. Step 3: Cross multiply
    10,359.20x = 15,538.80 × 7,767.20
  4. Step 4: Simplify right side
    10,359.20x = 120,692,967.36
  5. Step 5: Solve for x
    x = 120,692,967.36/10,359.20
  6. Step 6: Final answer
    x = 11,650.80

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Half scale
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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.