Home / 12,947.78-19,421.64-3,713.78

Finding the Fourth Proportional to 12,947.78, 19,421.64 and 3,713.78

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Solution

The fourth proportional to 12,947.78, 19,421.64 and 3,713.78 is: 5,570.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,947.78 : 19,421.64 = 3,713.78 : x
  2. Step 2: Convert to fraction form
    12,947.78/19,421.64 = 3,713.78/x
  3. Step 3: Cross multiply
    12,947.78x = 19,421.64 × 3,713.78
  4. Step 4: Simplify right side
    12,947.78x = 72,127,698.20
  5. Step 5: Solve for x
    x = 72,127,698.20/12,947.78
  6. Step 6: Final answer
    x = 5,570.66

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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.