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Finding the Fourth Proportional to 19,880.20, 29,820.30 and 8,775.10

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Solution

The fourth proportional to 19,880.20, 29,820.30 and 8,775.10 is: 13,162.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,880.20 : 29,820.30 = 8,775.10 : x
  2. Step 2: Convert to fraction form
    19,880.20/29,820.30 = 8,775.10/x
  3. Step 3: Cross multiply
    19,880.20x = 29,820.30 × 8,775.10
  4. Step 4: Simplify right side
    19,880.20x = 261,676,114.53
  5. Step 5: Solve for x
    x = 261,676,114.53/19,880.20
  6. Step 6: Final answer
    x = 13,162.65

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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.