Home / 20,738.70-31,111.19-7,587.95

Finding the Fourth Proportional to 20,738.70, 31,111.19 and 7,587.95

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Solution

The fourth proportional to 20,738.70, 31,111.19 and 7,587.95 is: 11,383.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.70 : 31,111.19 = 7,587.95 : x
  2. Step 2: Convert to fraction form
    20,738.70/31,111.19 = 7,587.95/x
  3. Step 3: Cross multiply
    20,738.70x = 31,111.19 × 7,587.95
  4. Step 4: Simplify right side
    20,738.70x = 236,070,154.16
  5. Step 5: Solve for x
    x = 236,070,154.16/20,738.70
  6. Step 6: Final answer
    x = 11,383.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.