Home / 14,723.76-20,318.78-8,439.78

Finding the Fourth Proportional to 14,723.76, 20,318.78 and 8,439.78

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Solution

The fourth proportional to 14,723.76, 20,318.78 and 8,439.78 is: 11,646.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,723.76 : 20,318.78 = 8,439.78 : x
  2. Step 2: Convert to fraction form
    14,723.76/20,318.78 = 8,439.78/x
  3. Step 3: Cross multiply
    14,723.76x = 20,318.78 × 8,439.78
  4. Step 4: Simplify right side
    14,723.76x = 171,486,033.07
  5. Step 5: Solve for x
    x = 171,486,033.07/14,723.76
  6. Step 6: Final answer
    x = 11,646.89

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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.