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Finding the Fourth Proportional to 30,080.43, 45,130.90 and 9,020.99

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Solution

The fourth proportional to 30,080.43, 45,130.90 and 9,020.99 is: 13,534.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,080.43 : 45,130.90 = 9,020.99 : x
  2. Step 2: Convert to fraction form
    30,080.43/45,130.90 = 9,020.99/x
  3. Step 3: Cross multiply
    30,080.43x = 45,130.90 × 9,020.99
  4. Step 4: Simplify right side
    30,080.43x = 407,125,149.38
  5. Step 5: Solve for x
    x = 407,125,149.38/30,080.43
  6. Step 6: Final answer
    x = 13,534.55

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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.