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Finding the Fourth Proportional to 17,219.80, 25,829.70 and 10,221.40

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Solution

The fourth proportional to 17,219.80, 25,829.70 and 10,221.40 is: 15,332.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,219.80 : 25,829.70 = 10,221.40 : x
  2. Step 2: Convert to fraction form
    17,219.80/25,829.70 = 10,221.40/x
  3. Step 3: Cross multiply
    17,219.80x = 25,829.70 × 10,221.40
  4. Step 4: Simplify right side
    17,219.80x = 264,015,695.58
  5. Step 5: Solve for x
    x = 264,015,695.58/17,219.80
  6. Step 6: Final answer
    x = 15,332.10

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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.