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Finding the Fourth Proportional to 21,837.80, 32,770.20 and 8,688.80

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Solution

The fourth proportional to 21,837.80, 32,770.20 and 8,688.80 is: 13,038.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,837.80 : 32,770.20 = 8,688.80 : x
  2. Step 2: Convert to fraction form
    21,837.80/32,770.20 = 8,688.80/x
  3. Step 3: Cross multiply
    21,837.80x = 32,770.20 × 8,688.80
  4. Step 4: Simplify right side
    21,837.80x = 284,733,713.76
  5. Step 5: Solve for x
    x = 284,733,713.76/21,837.80
  6. Step 6: Final answer
    x = 13,038.57

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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.