Home / 12,280.40-18,429.96-9,001.88

Finding the Fourth Proportional to 12,280.40, 18,429.96 and 9,001.88

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Solution

The fourth proportional to 12,280.40, 18,429.96 and 9,001.88 is: 13,509.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,280.40 : 18,429.96 = 9,001.88 : x
  2. Step 2: Convert to fraction form
    12,280.40/18,429.96 = 9,001.88/x
  3. Step 3: Cross multiply
    12,280.40x = 18,429.96 × 9,001.88
  4. Step 4: Simplify right side
    12,280.40x = 165,904,288.32
  5. Step 5: Solve for x
    x = 165,904,288.32/12,280.40
  6. Step 6: Final answer
    x = 13,509.68

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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.