Home / 13,321.50-20,025.45-12,359.58

Finding the Fourth Proportional to 13,321.50, 20,025.45 and 12,359.58

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Solution

The fourth proportional to 13,321.50, 20,025.45 and 12,359.58 is: 18,579.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.50 : 20,025.45 = 12,359.58 : x
  2. Step 2: Convert to fraction form
    13,321.50/20,025.45 = 12,359.58/x
  3. Step 3: Cross multiply
    13,321.50x = 20,025.45 × 12,359.58
  4. Step 4: Simplify right side
    13,321.50x = 247,506,151.31
  5. Step 5: Solve for x
    x = 247,506,151.31/13,321.50
  6. Step 6: Final answer
    x = 18,579.45

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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.