Home / 39,390.30-54,359.76-21,486.47

Finding the Fourth Proportional to 39,390.30, 54,359.76 and 21,486.47

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Solution

The fourth proportional to 39,390.30, 54,359.76 and 21,486.47 is: 29,651.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,390.30 : 54,359.76 = 21,486.47 : x
  2. Step 2: Convert to fraction form
    39,390.30/54,359.76 = 21,486.47/x
  3. Step 3: Cross multiply
    39,390.30x = 54,359.76 × 21,486.47
  4. Step 4: Simplify right side
    39,390.30x = 1,167,999,040.36
  5. Step 5: Solve for x
    x = 1,167,999,040.36/39,390.30
  6. Step 6: Final answer
    x = 29,651.95

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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.