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Finding the Fourth Proportional to 10,662.90, 15,994.46 and 8,686.23

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Solution

The fourth proportional to 10,662.90, 15,994.46 and 8,686.23 is: 13,029.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,662.90 : 15,994.46 = 8,686.23 : x
  2. Step 2: Convert to fraction form
    10,662.90/15,994.46 = 8,686.23/x
  3. Step 3: Cross multiply
    10,662.90x = 15,994.46 × 8,686.23
  4. Step 4: Simplify right side
    10,662.90x = 138,931,558.29
  5. Step 5: Solve for x
    x = 138,931,558.29/10,662.90
  6. Step 6: Final answer
    x = 13,029.43

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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.