Home / 20,281.18-27,989.12-11,328.88

Finding the Fourth Proportional to 20,281.18, 27,989.12 and 11,328.88

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Solution

The fourth proportional to 20,281.18, 27,989.12 and 11,328.88 is: 15,634.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.18 : 27,989.12 = 11,328.88 : x
  2. Step 2: Convert to fraction form
    20,281.18/27,989.12 = 11,328.88/x
  3. Step 3: Cross multiply
    20,281.18x = 27,989.12 × 11,328.88
  4. Step 4: Simplify right side
    20,281.18x = 317,085,381.79
  5. Step 5: Solve for x
    x = 317,085,381.79/20,281.18
  6. Step 6: Final answer
    x = 15,634.46

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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.