Home / 31,012.52-42,747.48-20,937.74

Finding the Fourth Proportional to 31,012.52, 42,747.48 and 20,937.74

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Solution

The fourth proportional to 31,012.52, 42,747.48 and 20,937.74 is: 28,860.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,012.52 : 42,747.48 = 20,937.74 : x
  2. Step 2: Convert to fraction form
    31,012.52/42,747.48 = 20,937.74/x
  3. Step 3: Cross multiply
    31,012.52x = 42,747.48 × 20,937.74
  4. Step 4: Simplify right side
    31,012.52x = 895,035,408.16
  5. Step 5: Solve for x
    x = 895,035,408.16/31,012.52
  6. Step 6: Final answer
    x = 28,860.46

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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.