Home / 20,697.22-31,024.30-18,870.39

Finding the Fourth Proportional to 20,697.22, 31,024.30 and 18,870.39

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Solution

The fourth proportional to 20,697.22, 31,024.30 and 18,870.39 is: 28,285.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,697.22 : 31,024.30 = 18,870.39 : x
  2. Step 2: Convert to fraction form
    20,697.22/31,024.30 = 18,870.39/x
  3. Step 3: Cross multiply
    20,697.22x = 31,024.30 × 18,870.39
  4. Step 4: Simplify right side
    20,697.22x = 585,440,795.55
  5. Step 5: Solve for x
    x = 585,440,795.55/20,697.22
  6. Step 6: Final answer
    x = 28,285.96

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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.