Home / 31,077.72-42,873.60-21,002.49

Finding the Fourth Proportional to 31,077.72, 42,873.60 and 21,002.49

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Solution

The fourth proportional to 31,077.72, 42,873.60 and 21,002.49 is: 28,974.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,077.72 : 42,873.60 = 21,002.49 : x
  2. Step 2: Convert to fraction form
    31,077.72/42,873.60 = 21,002.49/x
  3. Step 3: Cross multiply
    31,077.72x = 42,873.60 × 21,002.49
  4. Step 4: Simplify right side
    31,077.72x = 900,452,355.26
  5. Step 5: Solve for x
    x = 900,452,355.26/31,077.72
  6. Step 6: Final answer
    x = 28,974.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.