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Finding the Fourth Proportional to 13,484.80, 20,248.80 and 9,121.60

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Solution

The fourth proportional to 13,484.80, 20,248.80 and 9,121.60 is: 13,697.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,484.80 : 20,248.80 = 9,121.60 : x
  2. Step 2: Convert to fraction form
    13,484.80/20,248.80 = 9,121.60/x
  3. Step 3: Cross multiply
    13,484.80x = 20,248.80 × 9,121.60
  4. Step 4: Simplify right side
    13,484.80x = 184,701,454.08
  5. Step 5: Solve for x
    x = 184,701,454.08/13,484.80
  6. Step 6: Final answer
    x = 13,697.01

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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.