Home / 14,725.28-20,321.40-8,439.68

Finding the Fourth Proportional to 14,725.28, 20,321.40 and 8,439.68

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Solution

The fourth proportional to 14,725.28, 20,321.40 and 8,439.68 is: 11,647.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,725.28 : 20,321.40 = 8,439.68 : x
  2. Step 2: Convert to fraction form
    14,725.28/20,321.40 = 8,439.68/x
  3. Step 3: Cross multiply
    14,725.28x = 20,321.40 × 8,439.68
  4. Step 4: Simplify right side
    14,725.28x = 171,506,113.15
  5. Step 5: Solve for x
    x = 171,506,113.15/14,725.28
  6. Step 6: Final answer
    x = 11,647.05

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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.