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Finding the Fourth Proportional to 12,129.99, 16,737.03 and 7,659.87

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Solution

The fourth proportional to 12,129.99, 16,737.03 and 7,659.87 is: 10,569.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.99 : 16,737.03 = 7,659.87 : x
  2. Step 2: Convert to fraction form
    12,129.99/16,737.03 = 7,659.87/x
  3. Step 3: Cross multiply
    12,129.99x = 16,737.03 × 7,659.87
  4. Step 4: Simplify right side
    12,129.99x = 128,203,411.22
  5. Step 5: Solve for x
    x = 128,203,411.22/12,129.99
  6. Step 6: Final answer
    x = 10,569.13

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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.