Home / 11,980.28-17,948.52-8,685.20

Finding the Fourth Proportional to 11,980.28, 17,948.52 and 8,685.20

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Solution

The fourth proportional to 11,980.28, 17,948.52 and 8,685.20 is: 13,011.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,980.28 : 17,948.52 = 8,685.20 : x
  2. Step 2: Convert to fraction form
    11,980.28/17,948.52 = 8,685.20/x
  3. Step 3: Cross multiply
    11,980.28x = 17,948.52 × 8,685.20
  4. Step 4: Simplify right side
    11,980.28x = 155,886,485.90
  5. Step 5: Solve for x
    x = 155,886,485.90/11,980.28
  6. Step 6: Final answer
    x = 13,011.92

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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.