Home / 27,981.18-38,616.75-20,895.30

Finding the Fourth Proportional to 27,981.18, 38,616.75 and 20,895.30

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Solution

The fourth proportional to 27,981.18, 38,616.75 and 20,895.30 is: 28,837.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,981.18 : 38,616.75 = 20,895.30 : x
  2. Step 2: Convert to fraction form
    27,981.18/38,616.75 = 20,895.30/x
  3. Step 3: Cross multiply
    27,981.18x = 38,616.75 × 20,895.30
  4. Step 4: Simplify right side
    27,981.18x = 806,908,576.28
  5. Step 5: Solve for x
    x = 806,908,576.28/27,981.18
  6. Step 6: Final answer
    x = 28,837.55

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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.