Home / 13,425.20-20,118.60-9,316.40

Finding the Fourth Proportional to 13,425.20, 20,118.60 and 9,316.40

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Solution

The fourth proportional to 13,425.20, 20,118.60 and 9,316.40 is: 13,961.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,425.20 : 20,118.60 = 9,316.40 : x
  2. Step 2: Convert to fraction form
    13,425.20/20,118.60 = 9,316.40/x
  3. Step 3: Cross multiply
    13,425.20x = 20,118.60 × 9,316.40
  4. Step 4: Simplify right side
    13,425.20x = 187,432,925.04
  5. Step 5: Solve for x
    x = 187,432,925.04/13,425.20
  6. Step 6: Final answer
    x = 13,961.28

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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.