Home / 18,870.88-28,301.46-7,780.72

Finding the Fourth Proportional to 18,870.88, 28,301.46 and 7,780.72

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Solution

The fourth proportional to 18,870.88, 28,301.46 and 7,780.72 is: 11,669.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870.88 : 28,301.46 = 7,780.72 : x
  2. Step 2: Convert to fraction form
    18,870.88/28,301.46 = 7,780.72/x
  3. Step 3: Cross multiply
    18,870.88x = 28,301.46 × 7,780.72
  4. Step 4: Simplify right side
    18,870.88x = 220,205,735.85
  5. Step 5: Solve for x
    x = 220,205,735.85/18,870.88
  6. Step 6: Final answer
    x = 11,669.08

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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.