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Finding the Fourth Proportional to 21,885.76, 32,800.56 and 9,391.24

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Solution

The fourth proportional to 21,885.76, 32,800.56 and 9,391.24 is: 14,074.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,885.76 : 32,800.56 = 9,391.24 : x
  2. Step 2: Convert to fraction form
    21,885.76/32,800.56 = 9,391.24/x
  3. Step 3: Cross multiply
    21,885.76x = 32,800.56 × 9,391.24
  4. Step 4: Simplify right side
    21,885.76x = 308,037,931.09
  5. Step 5: Solve for x
    x = 308,037,931.09/21,885.76
  6. Step 6: Final answer
    x = 14,074.81

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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.