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Finding the Fourth Proportional to 30,581.18, 45,878.36 and 9,520.78

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Solution

The fourth proportional to 30,581.18, 45,878.36 and 9,520.78 is: 14,283.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,581.18 : 45,878.36 = 9,520.78 : x
  2. Step 2: Convert to fraction form
    30,581.18/45,878.36 = 9,520.78/x
  3. Step 3: Cross multiply
    30,581.18x = 45,878.36 × 9,520.78
  4. Step 4: Simplify right side
    30,581.18x = 436,797,772.32
  5. Step 5: Solve for x
    x = 436,797,772.32/30,581.18
  6. Step 6: Final answer
    x = 14,283.22

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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.