Home / 27,720.16-38,258.52-15,781.84

Finding the Fourth Proportional to 27,720.16, 38,258.52 and 15,781.84

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Solution

The fourth proportional to 27,720.16, 38,258.52 and 15,781.84 is: 21,781.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,720.16 : 38,258.52 = 15,781.84 : x
  2. Step 2: Convert to fraction form
    27,720.16/38,258.52 = 15,781.84/x
  3. Step 3: Cross multiply
    27,720.16x = 38,258.52 × 15,781.84
  4. Step 4: Simplify right side
    27,720.16x = 603,789,841.28
  5. Step 5: Solve for x
    x = 603,789,841.28/27,720.16
  6. Step 6: Final answer
    x = 21,781.61

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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.