Home / 28,079.85-42,083.34-11,420.49

Finding the Fourth Proportional to 28,079.85, 42,083.34 and 11,420.49

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Solution

The fourth proportional to 28,079.85, 42,083.34 and 11,420.49 is: 17,115.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,079.85 : 42,083.34 = 11,420.49 : x
  2. Step 2: Convert to fraction form
    28,079.85/42,083.34 = 11,420.49/x
  3. Step 3: Cross multiply
    28,079.85x = 42,083.34 × 11,420.49
  4. Step 4: Simplify right side
    28,079.85x = 480,612,363.64
  5. Step 5: Solve for x
    x = 480,612,363.64/28,079.85
  6. Step 6: Final answer
    x = 17,115.92

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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.