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Finding the Fourth Proportional to 12,254.66, 16,915.05 and 7,220.51

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Solution

The fourth proportional to 12,254.66, 16,915.05 and 7,220.51 is: 9,966.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,254.66 : 16,915.05 = 7,220.51 : x
  2. Step 2: Convert to fraction form
    12,254.66/16,915.05 = 7,220.51/x
  3. Step 3: Cross multiply
    12,254.66x = 16,915.05 × 7,220.51
  4. Step 4: Simplify right side
    12,254.66x = 122,135,263.44
  5. Step 5: Solve for x
    x = 122,135,263.44/12,254.66
  6. Step 6: Final answer
    x = 9,966.43

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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.