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Finding the Fourth Proportional to 30,408.67, 41,963.55 and 16,980.15

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Solution

The fourth proportional to 30,408.67, 41,963.55 and 16,980.15 is: 23,432.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,408.67 : 41,963.55 = 16,980.15 : x
  2. Step 2: Convert to fraction form
    30,408.67/41,963.55 = 16,980.15/x
  3. Step 3: Cross multiply
    30,408.67x = 41,963.55 × 16,980.15
  4. Step 4: Simplify right side
    30,408.67x = 712,547,373.53
  5. Step 5: Solve for x
    x = 712,547,373.53/30,408.67
  6. Step 6: Final answer
    x = 23,432.38

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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.