Home / 30,754.55-42,451.76-19,121.87

Finding the Fourth Proportional to 30,754.55, 42,451.76 and 19,121.87

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Solution

The fourth proportional to 30,754.55, 42,451.76 and 19,121.87 is: 26,394.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,754.55 : 42,451.76 = 19,121.87 : x
  2. Step 2: Convert to fraction form
    30,754.55/42,451.76 = 19,121.87/x
  3. Step 3: Cross multiply
    30,754.55x = 42,451.76 × 19,121.87
  4. Step 4: Simplify right side
    30,754.55x = 811,756,728.12
  5. Step 5: Solve for x
    x = 811,756,728.12/30,754.55
  6. Step 6: Final answer
    x = 26,394.69

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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.