Home / 28,079.86-42,083.35-11,420.50

Finding the Fourth Proportional to 28,079.86, 42,083.35 and 11,420.50

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Solution

The fourth proportional to 28,079.86, 42,083.35 and 11,420.50 is: 17,115.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,079.86 : 42,083.35 = 11,420.50 : x
  2. Step 2: Convert to fraction form
    28,079.86/42,083.35 = 11,420.50/x
  3. Step 3: Cross multiply
    28,079.86x = 42,083.35 × 11,420.50
  4. Step 4: Simplify right side
    28,079.86x = 480,612,898.68
  5. Step 5: Solve for x
    x = 480,612,898.68/28,079.86
  6. Step 6: Final answer
    x = 17,115.93

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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.