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Finding the Fourth Proportional to 27,661.76, 38,172.96 and 15,085.76

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Solution

The fourth proportional to 27,661.76, 38,172.96 and 15,085.76 is: 20,818.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,661.76 : 38,172.96 = 15,085.76 : x
  2. Step 2: Convert to fraction form
    27,661.76/38,172.96 = 15,085.76/x
  3. Step 3: Cross multiply
    27,661.76x = 38,172.96 × 15,085.76
  4. Step 4: Simplify right side
    27,661.76x = 575,868,113.05
  5. Step 5: Solve for x
    x = 575,868,113.05/27,661.76
  6. Step 6: Final answer
    x = 20,818.20

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Double scale
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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.