Home / 38,987.46-53,803.17-21,990.15

Finding the Fourth Proportional to 38,987.46, 53,803.17 and 21,990.15

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Solution

The fourth proportional to 38,987.46, 53,803.17 and 21,990.15 is: 30,346.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,987.46 : 53,803.17 = 21,990.15 : x
  2. Step 2: Convert to fraction form
    38,987.46/53,803.17 = 21,990.15/x
  3. Step 3: Cross multiply
    38,987.46x = 53,803.17 × 21,990.15
  4. Step 4: Simplify right side
    38,987.46x = 1,183,139,778.78
  5. Step 5: Solve for x
    x = 1,183,139,778.78/38,987.46
  6. Step 6: Final answer
    x = 30,346.68

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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.