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Finding the Fourth Proportional to 12,101.55, 16,695.47 and 8,922.40

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Solution

The fourth proportional to 12,101.55, 16,695.47 and 8,922.40 is: 12,309.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,101.55 : 16,695.47 = 8,922.40 : x
  2. Step 2: Convert to fraction form
    12,101.55/16,695.47 = 8,922.40/x
  3. Step 3: Cross multiply
    12,101.55x = 16,695.47 × 8,922.40
  4. Step 4: Simplify right side
    12,101.55x = 148,963,685.82
  5. Step 5: Solve for x
    x = 148,963,685.82/12,101.55
  6. Step 6: Final answer
    x = 12,309.48

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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.