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Finding the Fourth Proportional to 14,991.60, 20,689.08 and 8,620.26

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Solution

The fourth proportional to 14,991.60, 20,689.08 and 8,620.26 is: 11,896.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,991.60 : 20,689.08 = 8,620.26 : x
  2. Step 2: Convert to fraction form
    14,991.60/20,689.08 = 8,620.26/x
  3. Step 3: Cross multiply
    14,991.60x = 20,689.08 × 8,620.26
  4. Step 4: Simplify right side
    14,991.60x = 178,345,248.76
  5. Step 5: Solve for x
    x = 178,345,248.76/14,991.60
  6. Step 6: Final answer
    x = 11,896.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.