Home / 13,329.96-19,976.70-8,140.20

Finding the Fourth Proportional to 13,329.96, 19,976.70 and 8,140.20

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Solution

The fourth proportional to 13,329.96, 19,976.70 and 8,140.20 is: 12,199.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,329.96 : 19,976.70 = 8,140.20 : x
  2. Step 2: Convert to fraction form
    13,329.96/19,976.70 = 8,140.20/x
  3. Step 3: Cross multiply
    13,329.96x = 19,976.70 × 8,140.20
  4. Step 4: Simplify right side
    13,329.96x = 162,614,333.34
  5. Step 5: Solve for x
    x = 162,614,333.34/13,329.96
  6. Step 6: Final answer
    x = 12,199.16

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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.