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Finding the Fourth Proportional to 12,703.76, 17,512.90 and 8,915.19

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Solution

The fourth proportional to 12,703.76, 17,512.90 and 8,915.19 is: 12,290.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,703.76 : 17,512.90 = 8,915.19 : x
  2. Step 2: Convert to fraction form
    12,703.76/17,512.90 = 8,915.19/x
  3. Step 3: Cross multiply
    12,703.76x = 17,512.90 × 8,915.19
  4. Step 4: Simplify right side
    12,703.76x = 156,130,830.95
  5. Step 5: Solve for x
    x = 156,130,830.95/12,703.76
  6. Step 6: Final answer
    x = 12,290.13

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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.