Home / 30,679.26-42,320.09-18,411.53

Finding the Fourth Proportional to 30,679.26, 42,320.09 and 18,411.53

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Solution

The fourth proportional to 30,679.26, 42,320.09 and 18,411.53 is: 25,397.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,679.26 : 42,320.09 = 18,411.53 : x
  2. Step 2: Convert to fraction form
    30,679.26/42,320.09 = 18,411.53/x
  3. Step 3: Cross multiply
    30,679.26x = 42,320.09 × 18,411.53
  4. Step 4: Simplify right side
    30,679.26x = 779,177,620.38
  5. Step 5: Solve for x
    x = 779,177,620.38/30,679.26
  6. Step 6: Final answer
    x = 25,397.53

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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.