Home / 30,631.14-42,275.55-18,701.42

Finding the Fourth Proportional to 30,631.14, 42,275.55 and 18,701.42

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Solution

The fourth proportional to 30,631.14, 42,275.55 and 18,701.42 is: 25,810.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,631.14 : 42,275.55 = 18,701.42 : x
  2. Step 2: Convert to fraction form
    30,631.14/42,275.55 = 18,701.42/x
  3. Step 3: Cross multiply
    30,631.14x = 42,275.55 × 18,701.42
  4. Step 4: Simplify right side
    30,631.14x = 790,612,604.90
  5. Step 5: Solve for x
    x = 790,612,604.90/30,631.14
  6. Step 6: Final answer
    x = 25,810.75

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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.