Home / 39,405.73-54,378.85-21,500.73

Finding the Fourth Proportional to 39,405.73, 54,378.85 and 21,500.73

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Solution

The fourth proportional to 39,405.73, 54,378.85 and 21,500.73 is: 29,670.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,405.73 : 54,378.85 = 21,500.73 : x
  2. Step 2: Convert to fraction form
    39,405.73/54,378.85 = 21,500.73/x
  3. Step 3: Cross multiply
    39,405.73x = 54,378.85 × 21,500.73
  4. Step 4: Simplify right side
    39,405.73x = 1,169,184,971.56
  5. Step 5: Solve for x
    x = 1,169,184,971.56/39,405.73
  6. Step 6: Final answer
    x = 29,670.43

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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.