Home / 27,981.90-38,621.61-17,379.54

Finding the Fourth Proportional to 27,981.90, 38,621.61 and 17,379.54

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Solution

The fourth proportional to 27,981.90, 38,621.61 and 17,379.54 is: 23,987.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,981.90 : 38,621.61 = 17,379.54 : x
  2. Step 2: Convert to fraction form
    27,981.90/38,621.61 = 17,379.54/x
  3. Step 3: Cross multiply
    27,981.90x = 38,621.61 × 17,379.54
  4. Step 4: Simplify right side
    27,981.90x = 671,225,815.86
  5. Step 5: Solve for x
    x = 671,225,815.86/27,981.90
  6. Step 6: Final answer
    x = 23,987.86

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Double scale
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Similar ratio
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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.