Home / 18,877.92-28,320.30-7,778.45

Finding the Fourth Proportional to 18,877.92, 28,320.30 and 7,778.45

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Solution

The fourth proportional to 18,877.92, 28,320.30 and 7,778.45 is: 11,669.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,877.92 : 28,320.30 = 7,778.45 : x
  2. Step 2: Convert to fraction form
    18,877.92/28,320.30 = 7,778.45/x
  3. Step 3: Cross multiply
    18,877.92x = 28,320.30 × 7,778.45
  4. Step 4: Simplify right side
    18,877.92x = 220,287,895.93
  5. Step 5: Solve for x
    x = 220,287,895.93/18,877.92
  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.