Home / 30,597.87-42,219.45-20,540.91

Finding the Fourth Proportional to 30,597.87, 42,219.45 and 20,540.91

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Solution

The fourth proportional to 30,597.87, 42,219.45 and 20,540.91 is: 28,342.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,597.87 : 42,219.45 = 20,540.91 : x
  2. Step 2: Convert to fraction form
    30,597.87/42,219.45 = 20,540.91/x
  3. Step 3: Cross multiply
    30,597.87x = 42,219.45 × 20,540.91
  4. Step 4: Simplify right side
    30,597.87x = 867,225,922.70
  5. Step 5: Solve for x
    x = 867,225,922.70/30,597.87
  6. Step 6: Final answer
    x = 28,342.69

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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.