Home / 39,387.81-54,355.92-21,483.46

Finding the Fourth Proportional to 39,387.81, 54,355.92 and 21,483.46

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Solution

The fourth proportional to 39,387.81, 54,355.92 and 21,483.46 is: 29,647.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,387.81 : 54,355.92 = 21,483.46 : x
  2. Step 2: Convert to fraction form
    39,387.81/54,355.92 = 21,483.46/x
  3. Step 3: Cross multiply
    39,387.81x = 54,355.92 × 21,483.46
  4. Step 4: Simplify right side
    39,387.81x = 1,167,753,188.89
  5. Step 5: Solve for x
    x = 1,167,753,188.89/39,387.81
  6. Step 6: Final answer
    x = 29,647.58

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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.