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Finding the Fourth Proportional to 17,772.80, 26,659.20 and 9,478.40

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Solution

The fourth proportional to 17,772.80, 26,659.20 and 9,478.40 is: 14,217.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,772.80 : 26,659.20 = 9,478.40 : x
  2. Step 2: Convert to fraction form
    17,772.80/26,659.20 = 9,478.40/x
  3. Step 3: Cross multiply
    17,772.80x = 26,659.20 × 9,478.40
  4. Step 4: Simplify right side
    17,772.80x = 252,686,561.28
  5. Step 5: Solve for x
    x = 252,686,561.28/17,772.80
  6. Step 6: Final answer
    x = 14,217.60

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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.