Home / 28,108.20-42,157.95-12,309.76

Finding the Fourth Proportional to 28,108.20, 42,157.95 and 12,309.76

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Solution

The fourth proportional to 28,108.20, 42,157.95 and 12,309.76 is: 18,462.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,108.20 : 42,157.95 = 12,309.76 : x
  2. Step 2: Convert to fraction form
    28,108.20/42,157.95 = 12,309.76/x
  3. Step 3: Cross multiply
    28,108.20x = 42,157.95 × 12,309.76
  4. Step 4: Simplify right side
    28,108.20x = 518,954,246.59
  5. Step 5: Solve for x
    x = 518,954,246.59/28,108.20
  6. Step 6: Final answer
    x = 18,462.73

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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.