Home / 30,455.06-42,028.13-17,715.78

Finding the Fourth Proportional to 30,455.06, 42,028.13 and 17,715.78

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Solution

The fourth proportional to 30,455.06, 42,028.13 and 17,715.78 is: 24,447.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,455.06 : 42,028.13 = 17,715.78 : x
  2. Step 2: Convert to fraction form
    30,455.06/42,028.13 = 17,715.78/x
  3. Step 3: Cross multiply
    30,455.06x = 42,028.13 × 17,715.78
  4. Step 4: Simplify right side
    30,455.06x = 744,561,149.18
  5. Step 5: Solve for x
    x = 744,561,149.18/30,455.06
  6. Step 6: Final answer
    x = 24,447.87

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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.