Home / 21,125.36-29,149.45-12,630.92

Finding the Fourth Proportional to 21,125.36, 29,149.45 and 12,630.92

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Solution

The fourth proportional to 21,125.36, 29,149.45 and 12,630.92 is: 17,428.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,125.36 : 29,149.45 = 12,630.92 : x
  2. Step 2: Convert to fraction form
    21,125.36/29,149.45 = 12,630.92/x
  3. Step 3: Cross multiply
    21,125.36x = 29,149.45 × 12,630.92
  4. Step 4: Simplify right side
    21,125.36x = 368,184,370.99
  5. Step 5: Solve for x
    x = 368,184,370.99/21,125.36
  6. Step 6: Final answer
    x = 17,428.55

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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.