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Finding the Fourth Proportional to 12,561.84, 18,842.76 and 4,770.63

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Solution

The fourth proportional to 12,561.84, 18,842.76 and 4,770.63 is: 7,155.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,561.84 : 18,842.76 = 4,770.63 : x
  2. Step 2: Convert to fraction form
    12,561.84/18,842.76 = 4,770.63/x
  3. Step 3: Cross multiply
    12,561.84x = 18,842.76 × 4,770.63
  4. Step 4: Simplify right side
    12,561.84x = 89,891,836.14
  5. Step 5: Solve for x
    x = 89,891,836.14/12,561.84
  6. Step 6: Final answer
    x = 7,155.95

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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.