Home / 18,872.95-28,320.36-7,777.57

Finding the Fourth Proportional to 18,872.95, 28,320.36 and 7,777.57

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Solution

The fourth proportional to 18,872.95, 28,320.36 and 7,777.57 is: 11,670.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,872.95 : 28,320.36 = 7,777.57 : x
  2. Step 2: Convert to fraction form
    18,872.95/28,320.36 = 7,777.57/x
  3. Step 3: Cross multiply
    18,872.95x = 28,320.36 × 7,777.57
  4. Step 4: Simplify right side
    18,872.95x = 220,263,582.33
  5. Step 5: Solve for x
    x = 220,263,582.33/18,872.95
  6. Step 6: Final answer
    x = 11,670.86

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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.