Home / 30,689.97-42,337.15-18,732.55

Finding the Fourth Proportional to 30,689.97, 42,337.15 and 18,732.55

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Solution

The fourth proportional to 30,689.97, 42,337.15 and 18,732.55 is: 25,841.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,689.97 : 42,337.15 = 18,732.55 : x
  2. Step 2: Convert to fraction form
    30,689.97/42,337.15 = 18,732.55/x
  3. Step 3: Cross multiply
    30,689.97x = 42,337.15 × 18,732.55
  4. Step 4: Simplify right side
    30,689.97x = 793,082,779.23
  5. Step 5: Solve for x
    x = 793,082,779.23/30,689.97
  6. Step 6: Final answer
    x = 25,841.76

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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.