Home / 21,142.93-29,177.16-12,190.39

Finding the Fourth Proportional to 21,142.93, 29,177.16 and 12,190.39

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Solution

The fourth proportional to 21,142.93, 29,177.16 and 12,190.39 is: 16,822.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,142.93 : 29,177.16 = 12,190.39 : x
  2. Step 2: Convert to fraction form
    21,142.93/29,177.16 = 12,190.39/x
  3. Step 3: Cross multiply
    21,142.93x = 29,177.16 × 12,190.39
  4. Step 4: Simplify right side
    21,142.93x = 355,680,959.49
  5. Step 5: Solve for x
    x = 355,680,959.49/21,142.93
  6. Step 6: Final answer
    x = 16,822.69

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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.