Home / 13,155.60-18,154.80-8,439.92

Finding the Fourth Proportional to 13,155.60, 18,154.80 and 8,439.92

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Solution

The fourth proportional to 13,155.60, 18,154.80 and 8,439.92 is: 11,647.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.60 : 18,154.80 = 8,439.92 : x
  2. Step 2: Convert to fraction form
    13,155.60/18,154.80 = 8,439.92/x
  3. Step 3: Cross multiply
    13,155.60x = 18,154.80 × 8,439.92
  4. Step 4: Simplify right side
    13,155.60x = 153,225,059.62
  5. Step 5: Solve for x
    x = 153,225,059.62/13,155.60
  6. Step 6: Final answer
    x = 11,647.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.