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Finding the Fourth Proportional to 21,780.85, 32,674.17 and 6,984.85

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Solution

The fourth proportional to 21,780.85, 32,674.17 and 6,984.85 is: 10,478.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.85 : 32,674.17 = 6,984.85 : x
  2. Step 2: Convert to fraction form
    21,780.85/32,674.17 = 6,984.85/x
  3. Step 3: Cross multiply
    21,780.85x = 32,674.17 × 6,984.85
  4. Step 4: Simplify right side
    21,780.85x = 228,224,176.32
  5. Step 5: Solve for x
    x = 228,224,176.32/21,780.85
  6. Step 6: Final answer
    x = 10,478.20

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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.