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Finding the Fourth Proportional to 12,947.84, 19,421.60 and 3,713.84

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Solution

The fourth proportional to 12,947.84, 19,421.60 and 3,713.84 is: 5,570.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,947.84 : 19,421.60 = 3,713.84 : x
  2. Step 2: Convert to fraction form
    12,947.84/19,421.60 = 3,713.84/x
  3. Step 3: Cross multiply
    12,947.84x = 19,421.60 × 3,713.84
  4. Step 4: Simplify right side
    12,947.84x = 72,128,714.94
  5. Step 5: Solve for x
    x = 72,128,714.94/12,947.84
  6. Step 6: Final answer
    x = 5,570.71

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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.