Home / 20,818.56-31,188.36-12,367.20

Finding the Fourth Proportional to 20,818.56, 31,188.36 and 12,367.20

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Solution

The fourth proportional to 20,818.56, 31,188.36 and 12,367.20 is: 18,527.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.56 : 31,188.36 = 12,367.20 : x
  2. Step 2: Convert to fraction form
    20,818.56/31,188.36 = 12,367.20/x
  3. Step 3: Cross multiply
    20,818.56x = 31,188.36 × 12,367.20
  4. Step 4: Simplify right side
    20,818.56x = 385,712,685.79
  5. Step 5: Solve for x
    x = 385,712,685.79/20,818.56
  6. Step 6: Final answer
    x = 18,527.35

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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.