Home / 30,581.08-42,173.46-20,367.88

Finding the Fourth Proportional to 30,581.08, 42,173.46 and 20,367.88

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Solution

The fourth proportional to 30,581.08, 42,173.46 and 20,367.88 is: 28,088.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,581.08 : 42,173.46 = 20,367.88 : x
  2. Step 2: Convert to fraction form
    30,581.08/42,173.46 = 20,367.88/x
  3. Step 3: Cross multiply
    30,581.08x = 42,173.46 × 20,367.88
  4. Step 4: Simplify right side
    30,581.08x = 858,983,972.46
  5. Step 5: Solve for x
    x = 858,983,972.46/30,581.08
  6. Step 6: Final answer
    x = 28,088.74

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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.