Home / 20,887.25-31,303.13-18,100.88

Finding the Fourth Proportional to 20,887.25, 31,303.13 and 18,100.88

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Solution

The fourth proportional to 20,887.25, 31,303.13 and 18,100.88 is: 27,127.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.25 : 31,303.13 = 18,100.88 : x
  2. Step 2: Convert to fraction form
    20,887.25/31,303.13 = 18,100.88/x
  3. Step 3: Cross multiply
    20,887.25x = 31,303.13 × 18,100.88
  4. Step 4: Simplify right side
    20,887.25x = 566,614,088.49
  5. Step 5: Solve for x
    x = 566,614,088.49/20,887.25
  6. Step 6: Final answer
    x = 27,127.28

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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.