Home / 21,127.12-31,695.48-11,261.20

Finding the Fourth Proportional to 21,127.12, 31,695.48 and 11,261.20

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Solution

The fourth proportional to 21,127.12, 31,695.48 and 11,261.20 is: 16,894.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.12 : 31,695.48 = 11,261.20 : x
  2. Step 2: Convert to fraction form
    21,127.12/31,695.48 = 11,261.20/x
  3. Step 3: Cross multiply
    21,127.12x = 31,695.48 × 11,261.20
  4. Step 4: Simplify right side
    21,127.12x = 356,929,139.38
  5. Step 5: Solve for x
    x = 356,929,139.38/21,127.12
  6. Step 6: Final answer
    x = 16,894.36

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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.