Home / 20,587.66-28,410.97-11,156.22

Finding the Fourth Proportional to 20,587.66, 28,410.97 and 11,156.22

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Solution

The fourth proportional to 20,587.66, 28,410.97 and 11,156.22 is: 15,395.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.66 : 28,410.97 = 11,156.22 : x
  2. Step 2: Convert to fraction form
    20,587.66/28,410.97 = 11,156.22/x
  3. Step 3: Cross multiply
    20,587.66x = 28,410.97 × 11,156.22
  4. Step 4: Simplify right side
    20,587.66x = 316,959,031.73
  5. Step 5: Solve for x
    x = 316,959,031.73/20,587.66
  6. Step 6: Final answer
    x = 15,395.58

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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.