Home / 30,988.49-42,759.66-18,234.09

Finding the Fourth Proportional to 30,988.49, 42,759.66 and 18,234.09

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Solution

The fourth proportional to 30,988.49, 42,759.66 and 18,234.09 is: 25,160.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,988.49 : 42,759.66 = 18,234.09 : x
  2. Step 2: Convert to fraction form
    30,988.49/42,759.66 = 18,234.09/x
  3. Step 3: Cross multiply
    30,988.49x = 42,759.66 × 18,234.09
  4. Step 4: Simplify right side
    30,988.49x = 779,683,488.81
  5. Step 5: Solve for x
    x = 779,683,488.81/30,988.49
  6. Step 6: Final answer
    x = 25,160.42

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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.