Home / 28,203.86-42,305.85-7,143.91

Finding the Fourth Proportional to 28,203.86, 42,305.85 and 7,143.91

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Solution

The fourth proportional to 28,203.86, 42,305.85 and 7,143.91 is: 10,715.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,203.86 : 42,305.85 = 7,143.91 : x
  2. Step 2: Convert to fraction form
    28,203.86/42,305.85 = 7,143.91/x
  3. Step 3: Cross multiply
    28,203.86x = 42,305.85 × 7,143.91
  4. Step 4: Simplify right side
    28,203.86x = 302,229,079.11
  5. Step 5: Solve for x
    x = 302,229,079.11/28,203.86
  6. Step 6: Final answer
    x = 10,715.88

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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.