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Finding the Fourth Proportional to 14,672.90, 21,980.55 and 8,812.10

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Solution

The fourth proportional to 14,672.90, 21,980.55 and 8,812.10 is: 13,200.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,672.90 : 21,980.55 = 8,812.10 : x
  2. Step 2: Convert to fraction form
    14,672.90/21,980.55 = 8,812.10/x
  3. Step 3: Cross multiply
    14,672.90x = 21,980.55 × 8,812.10
  4. Step 4: Simplify right side
    14,672.90x = 193,694,804.66
  5. Step 5: Solve for x
    x = 193,694,804.66/14,672.90
  6. Step 6: Final answer
    x = 13,200.85

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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.