Home / 18,780.36-28,133.28-12,521.76

Finding the Fourth Proportional to 18,780.36, 28,133.28 and 12,521.76

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Solution

The fourth proportional to 18,780.36, 28,133.28 and 12,521.76 is: 18,757.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,780.36 : 28,133.28 = 12,521.76 : x
  2. Step 2: Convert to fraction form
    18,780.36/28,133.28 = 12,521.76/x
  3. Step 3: Cross multiply
    18,780.36x = 28,133.28 × 12,521.76
  4. Step 4: Simplify right side
    18,780.36x = 352,278,180.17
  5. Step 5: Solve for x
    x = 352,278,180.17/18,780.36
  6. Step 6: Final answer
    x = 18,757.80

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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.