Home / 20,867.60-31,309.37-12,553.49

Finding the Fourth Proportional to 20,867.60, 31,309.37 and 12,553.49

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Solution

The fourth proportional to 20,867.60, 31,309.37 and 12,553.49 is: 18,835.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.60 : 31,309.37 = 12,553.49 : x
  2. Step 2: Convert to fraction form
    20,867.60/31,309.37 = 12,553.49/x
  3. Step 3: Cross multiply
    20,867.60x = 31,309.37 × 12,553.49
  4. Step 4: Simplify right side
    20,867.60x = 393,041,925.78
  5. Step 5: Solve for x
    x = 393,041,925.78/20,867.60
  6. Step 6: Final answer
    x = 18,835.03

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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.