Home / 18,870.85-28,311.13-7,177.69

Finding the Fourth Proportional to 18,870.85, 28,311.13 and 7,177.69

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Solution

The fourth proportional to 18,870.85, 28,311.13 and 7,177.69 is: 10,768.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870.85 : 28,311.13 = 7,177.69 : x
  2. Step 2: Convert to fraction form
    18,870.85/28,311.13 = 7,177.69/x
  3. Step 3: Cross multiply
    18,870.85x = 28,311.13 × 7,177.69
  4. Step 4: Simplify right side
    18,870.85x = 203,208,373.13
  5. Step 5: Solve for x
    x = 203,208,373.13/18,870.85
  6. Step 6: Final answer
    x = 10,768.38

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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.