Home / 30,937.80-42,672.11-28,393.76

Finding the Fourth Proportional to 30,937.80, 42,672.11 and 28,393.76

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Solution

The fourth proportional to 30,937.80, 42,672.11 and 28,393.76 is: 39,163.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,937.80 : 42,672.11 = 28,393.76 : x
  2. Step 2: Convert to fraction form
    30,937.80/42,672.11 = 28,393.76/x
  3. Step 3: Cross multiply
    30,937.80x = 42,672.11 × 28,393.76
  4. Step 4: Simplify right side
    30,937.80x = 1,211,621,650.03
  5. Step 5: Solve for x
    x = 1,211,621,650.03/30,937.80
  6. Step 6: Final answer
    x = 39,163.15

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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.