Home / 28,519.29-42,778.67-7,742.79

Finding the Fourth Proportional to 28,519.29, 42,778.67 and 7,742.79

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Solution

The fourth proportional to 28,519.29, 42,778.67 and 7,742.79 is: 11,614.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,519.29 : 42,778.67 = 7,742.79 : x
  2. Step 2: Convert to fraction form
    28,519.29/42,778.67 = 7,742.79/x
  3. Step 3: Cross multiply
    28,519.29x = 42,778.67 × 7,742.79
  4. Step 4: Simplify right side
    28,519.29x = 331,226,219.58
  5. Step 5: Solve for x
    x = 331,226,219.58/28,519.29
  6. Step 6: Final answer
    x = 11,614.11

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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.