Home / 30,808.79-42,518.10-17,375.15

Finding the Fourth Proportional to 30,808.79, 42,518.10 and 17,375.15

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Solution

The fourth proportional to 30,808.79, 42,518.10 and 17,375.15 is: 23,978.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,808.79 : 42,518.10 = 17,375.15 : x
  2. Step 2: Convert to fraction form
    30,808.79/42,518.10 = 17,375.15/x
  3. Step 3: Cross multiply
    30,808.79x = 42,518.10 × 17,375.15
  4. Step 4: Simplify right side
    30,808.79x = 738,758,257.64
  5. Step 5: Solve for x
    x = 738,758,257.64/30,808.79
  6. Step 6: Final answer
    x = 23,978.81

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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.