Home / 30,688.38-42,344.82-18,115.56

Finding the Fourth Proportional to 30,688.38, 42,344.82 and 18,115.56

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Solution

The fourth proportional to 30,688.38, 42,344.82 and 18,115.56 is: 24,996.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,688.38 : 42,344.82 = 18,115.56 : x
  2. Step 2: Convert to fraction form
    30,688.38/42,344.82 = 18,115.56/x
  3. Step 3: Cross multiply
    30,688.38x = 42,344.82 × 18,115.56
  4. Step 4: Simplify right side
    30,688.38x = 767,100,127.40
  5. Step 5: Solve for x
    x = 767,100,127.40/30,688.38
  6. Step 6: Final answer
    x = 24,996.44

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Half scale
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Double scale
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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.