Home / 20,988.76-31,487.76-9,144.44

Finding the Fourth Proportional to 20,988.76, 31,487.76 and 9,144.44

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Solution

The fourth proportional to 20,988.76, 31,487.76 and 9,144.44 is: 13,718.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,988.76 : 31,487.76 = 9,144.44 : x
  2. Step 2: Convert to fraction form
    20,988.76/31,487.76 = 9,144.44/x
  3. Step 3: Cross multiply
    20,988.76x = 31,487.76 × 9,144.44
  4. Step 4: Simplify right side
    20,988.76x = 287,937,932.05
  5. Step 5: Solve for x
    x = 287,937,932.05/20,988.76
  6. Step 6: Final answer
    x = 13,718.67

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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.