Home / 20,107.60-30,161.40-8,259.36

Finding the Fourth Proportional to 20,107.60, 30,161.40 and 8,259.36

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Solution

The fourth proportional to 20,107.60, 30,161.40 and 8,259.36 is: 12,389.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,107.60 : 30,161.40 = 8,259.36 : x
  2. Step 2: Convert to fraction form
    20,107.60/30,161.40 = 8,259.36/x
  3. Step 3: Cross multiply
    20,107.60x = 30,161.40 × 8,259.36
  4. Step 4: Simplify right side
    20,107.60x = 249,113,860.70
  5. Step 5: Solve for x
    x = 249,113,860.70/20,107.60
  6. Step 6: Final answer
    x = 12,389.04

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Half scale
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Double scale
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Similar ratio
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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.