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Finding the Fourth Proportional to 11,210.80, 15,454 and 9,217.90

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Solution

The fourth proportional to 11,210.80, 15,454 and 9,217.90 is: 12,706.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,210.80 : 15,454 = 9,217.90 : x
  2. Step 2: Convert to fraction form
    11,210.80/15,454 = 9,217.90/x
  3. Step 3: Cross multiply
    11,210.80x = 15,454 × 9,217.90
  4. Step 4: Simplify right side
    11,210.80x = 142,453,426.60
  5. Step 5: Solve for x
    x = 142,453,426.60/11,210.80
  6. Step 6: Final answer
    x = 12,706.80

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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.