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Finding the Fourth Proportional to 12,489.10, 17,211.25 and 8,946.16

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Solution

The fourth proportional to 12,489.10, 17,211.25 and 8,946.16 is: 12,328.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.10 : 17,211.25 = 8,946.16 : x
  2. Step 2: Convert to fraction form
    12,489.10/17,211.25 = 8,946.16/x
  3. Step 3: Cross multiply
    12,489.10x = 17,211.25 × 8,946.16
  4. Step 4: Simplify right side
    12,489.10x = 153,974,596.30
  5. Step 5: Solve for x
    x = 153,974,596.30/12,489.10
  6. Step 6: Final answer
    x = 12,328.72

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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.