Home / 20,155.60-30,233.40-12,368.80

Finding the Fourth Proportional to 20,155.60, 30,233.40 and 12,368.80

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Solution

The fourth proportional to 20,155.60, 30,233.40 and 12,368.80 is: 18,553.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.60 : 30,233.40 = 12,368.80 : x
  2. Step 2: Convert to fraction form
    20,155.60/30,233.40 = 12,368.80/x
  3. Step 3: Cross multiply
    20,155.60x = 30,233.40 × 12,368.80
  4. Step 4: Simplify right side
    20,155.60x = 373,950,877.92
  5. Step 5: Solve for x
    x = 373,950,877.92/20,155.60
  6. Step 6: Final answer
    x = 18,553.20

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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.