Home / 30,988.90-42,715.60-28,414.62

Finding the Fourth Proportional to 30,988.90, 42,715.60 and 28,414.62

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Solution

The fourth proportional to 30,988.90, 42,715.60 and 28,414.62 is: 39,167.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,988.90 : 42,715.60 = 28,414.62 : x
  2. Step 2: Convert to fraction form
    30,988.90/42,715.60 = 28,414.62/x
  3. Step 3: Cross multiply
    30,988.90x = 42,715.60 × 28,414.62
  4. Step 4: Simplify right side
    30,988.90x = 1,213,747,328.49
  5. Step 5: Solve for x
    x = 1,213,747,328.49/30,988.90
  6. Step 6: Final answer
    x = 39,167.17

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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.