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Finding the Fourth Proportional to 17,720.80, 26,581.24 and 16,638.24

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Solution

The fourth proportional to 17,720.80, 26,581.24 and 16,638.24 is: 24,957.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,720.80 : 26,581.24 = 16,638.24 : x
  2. Step 2: Convert to fraction form
    17,720.80/26,581.24 = 16,638.24/x
  3. Step 3: Cross multiply
    17,720.80x = 26,581.24 × 16,638.24
  4. Step 4: Simplify right side
    17,720.80x = 442,265,050.62
  5. Step 5: Solve for x
    x = 442,265,050.62/17,720.80
  6. Step 6: Final answer
    x = 24,957.40

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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.