Home / 14,991.28-20,686.80-8,704.12

Finding the Fourth Proportional to 14,991.28, 20,686.80 and 8,704.12

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Solution

The fourth proportional to 14,991.28, 20,686.80 and 8,704.12 is: 12,011.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,991.28 : 20,686.80 = 8,704.12 : x
  2. Step 2: Convert to fraction form
    14,991.28/20,686.80 = 8,704.12/x
  3. Step 3: Cross multiply
    14,991.28x = 20,686.80 × 8,704.12
  4. Step 4: Simplify right side
    14,991.28x = 180,060,389.62
  5. Step 5: Solve for x
    x = 180,060,389.62/14,991.28
  6. Step 6: Final answer
    x = 12,011.01

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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.