Home / 30,810.38-42,518.30-17,381.57

Finding the Fourth Proportional to 30,810.38, 42,518.30 and 17,381.57

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Solution

The fourth proportional to 30,810.38, 42,518.30 and 17,381.57 is: 23,986.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,810.38 : 42,518.30 = 17,381.57 : x
  2. Step 2: Convert to fraction form
    30,810.38/42,518.30 = 17,381.57/x
  3. Step 3: Cross multiply
    30,810.38x = 42,518.30 × 17,381.57
  4. Step 4: Simplify right side
    30,810.38x = 739,034,508.23
  5. Step 5: Solve for x
    x = 739,034,508.23/30,810.38
  6. Step 6: Final answer
    x = 23,986.55

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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.