Home / 39,235.50-54,143.82-21,330.18

Finding the Fourth Proportional to 39,235.50, 54,143.82 and 21,330.18

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Solution

The fourth proportional to 39,235.50, 54,143.82 and 21,330.18 is: 29,435.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,235.50 : 54,143.82 = 21,330.18 : x
  2. Step 2: Convert to fraction form
    39,235.50/54,143.82 = 21,330.18/x
  3. Step 3: Cross multiply
    39,235.50x = 54,143.82 × 21,330.18
  4. Step 4: Simplify right side
    39,235.50x = 1,154,897,426.49
  5. Step 5: Solve for x
    x = 1,154,897,426.49/39,235.50
  6. Step 6: Final answer
    x = 29,435.01

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Double scale
Find fourth proportional to 39,236.50, 54,145.20 and 21,331.18
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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.