Home / 12,947.72-19,384.65-8,778.75

Finding the Fourth Proportional to 12,947.72, 19,384.65 and 8,778.75

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Solution

The fourth proportional to 12,947.72, 19,384.65 and 8,778.75 is: 13,143.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,947.72 : 19,384.65 = 8,778.75 : x
  2. Step 2: Convert to fraction form
    12,947.72/19,384.65 = 8,778.75/x
  3. Step 3: Cross multiply
    12,947.72x = 19,384.65 × 8,778.75
  4. Step 4: Simplify right side
    12,947.72x = 170,172,923.50
  5. Step 5: Solve for x
    x = 170,172,923.50/12,947.72
  6. Step 6: Final answer
    x = 13,143.09

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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.