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Finding the Fourth Proportional to 12,151.51, 16,772.21 and 7,913.15

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Solution

The fourth proportional to 12,151.51, 16,772.21 and 7,913.15 is: 10,922.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,151.51 : 16,772.21 = 7,913.15 : x
  2. Step 2: Convert to fraction form
    12,151.51/16,772.21 = 7,913.15/x
  3. Step 3: Cross multiply
    12,151.51x = 16,772.21 × 7,913.15
  4. Step 4: Simplify right side
    12,151.51x = 132,721,013.56
  5. Step 5: Solve for x
    x = 132,721,013.56/12,151.51
  6. Step 6: Final answer
    x = 10,922.18

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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.