Home / 21,130.92-29,160.18-12,177.86

Finding the Fourth Proportional to 21,130.92, 29,160.18 and 12,177.86

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Solution

The fourth proportional to 21,130.92, 29,160.18 and 12,177.86 is: 16,805.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.92 : 29,160.18 = 12,177.86 : x
  2. Step 2: Convert to fraction form
    21,130.92/29,160.18 = 12,177.86/x
  3. Step 3: Cross multiply
    21,130.92x = 29,160.18 × 12,177.86
  4. Step 4: Simplify right side
    21,130.92x = 355,108,443.81
  5. Step 5: Solve for x
    x = 355,108,443.81/21,130.92
  6. Step 6: Final answer
    x = 16,805.16

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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.