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Finding the Fourth Proportional to 15,909.66, 21,955.78 and 8,836.53

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Solution

The fourth proportional to 15,909.66, 21,955.78 and 8,836.53 is: 12,194.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,909.66 : 21,955.78 = 8,836.53 : x
  2. Step 2: Convert to fraction form
    15,909.66/21,955.78 = 8,836.53/x
  3. Step 3: Cross multiply
    15,909.66x = 21,955.78 × 8,836.53
  4. Step 4: Simplify right side
    15,909.66x = 194,013,002.02
  5. Step 5: Solve for x
    x = 194,013,002.02/15,909.66
  6. Step 6: Final answer
    x = 12,194.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.