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Finding the Fourth Proportional to 22,454.40, 30,986.40 and 12,518.40

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Solution

The fourth proportional to 22,454.40, 30,986.40 and 12,518.40 is: 17,275.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,454.40 : 30,986.40 = 12,518.40 : x
  2. Step 2: Convert to fraction form
    22,454.40/30,986.40 = 12,518.40/x
  3. Step 3: Cross multiply
    22,454.40x = 30,986.40 × 12,518.40
  4. Step 4: Simplify right side
    22,454.40x = 387,900,149.76
  5. Step 5: Solve for x
    x = 387,900,149.76/22,454.40
  6. Step 6: Final answer
    x = 17,275.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.