Home / 21,127.76-31,661.40-11,874.32

Finding the Fourth Proportional to 21,127.76, 31,661.40 and 11,874.32

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Solution

The fourth proportional to 21,127.76, 31,661.40 and 11,874.32 is: 17,794.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.76 : 31,661.40 = 11,874.32 : x
  2. Step 2: Convert to fraction form
    21,127.76/31,661.40 = 11,874.32/x
  3. Step 3: Cross multiply
    21,127.76x = 31,661.40 × 11,874.32
  4. Step 4: Simplify right side
    21,127.76x = 375,957,595.25
  5. Step 5: Solve for x
    x = 375,957,595.25/21,127.76
  6. Step 6: Final answer
    x = 17,794.48

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1.5x scale

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.