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Finding the Fourth Proportional to 10,686.80, 16,030.20 and 9,666.20

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Solution

The fourth proportional to 10,686.80, 16,030.20 and 9,666.20 is: 14,499.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,686.80 : 16,030.20 = 9,666.20 : x
  2. Step 2: Convert to fraction form
    10,686.80/16,030.20 = 9,666.20/x
  3. Step 3: Cross multiply
    10,686.80x = 16,030.20 × 9,666.20
  4. Step 4: Simplify right side
    10,686.80x = 154,951,119.24
  5. Step 5: Solve for x
    x = 154,951,119.24/10,686.80
  6. Step 6: Final answer
    x = 14,499.30

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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.