Home / 30,753.45-42,440.40-18,653.85

Finding the Fourth Proportional to 30,753.45, 42,440.40 and 18,653.85

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Solution

The fourth proportional to 30,753.45, 42,440.40 and 18,653.85 is: 25,742.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,753.45 : 42,440.40 = 18,653.85 : x
  2. Step 2: Convert to fraction form
    30,753.45/42,440.40 = 18,653.85/x
  3. Step 3: Cross multiply
    30,753.45x = 42,440.40 × 18,653.85
  4. Step 4: Simplify right side
    30,753.45x = 791,676,855.54
  5. Step 5: Solve for x
    x = 791,676,855.54/30,753.45
  6. Step 6: Final answer
    x = 25,742.70

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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.