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Finding the Fourth Proportional to 30,480.62, 45,720.93 and 12,938.14

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Solution

The fourth proportional to 30,480.62, 45,720.93 and 12,938.14 is: 19,407.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,480.62 : 45,720.93 = 12,938.14 : x
  2. Step 2: Convert to fraction form
    30,480.62/45,720.93 = 12,938.14/x
  3. Step 3: Cross multiply
    30,480.62x = 45,720.93 × 12,938.14
  4. Step 4: Simplify right side
    30,480.62x = 591,543,793.27
  5. Step 5: Solve for x
    x = 591,543,793.27/30,480.62
  6. Step 6: Final answer
    x = 19,407.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.