Home / 21,124.92-29,155.44-12,170.70

Finding the Fourth Proportional to 21,124.92, 29,155.44 and 12,170.70

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Solution

The fourth proportional to 21,124.92, 29,155.44 and 12,170.70 is: 16,797.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,124.92 : 29,155.44 = 12,170.70 : x
  2. Step 2: Convert to fraction form
    21,124.92/29,155.44 = 12,170.70/x
  3. Step 3: Cross multiply
    21,124.92x = 29,155.44 × 12,170.70
  4. Step 4: Simplify right side
    21,124.92x = 354,842,113.61
  5. Step 5: Solve for x
    x = 354,842,113.61/21,124.92
  6. Step 6: Final answer
    x = 16,797.32

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Double scale
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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.