Home / 12,947.80-19,421.70-9,667.30

Finding the Fourth Proportional to 12,947.80, 19,421.70 and 9,667.30

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Solution

The fourth proportional to 12,947.80, 19,421.70 and 9,667.30 is: 14,500.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,947.80 : 19,421.70 = 9,667.30 : x
  2. Step 2: Convert to fraction form
    12,947.80/19,421.70 = 9,667.30/x
  3. Step 3: Cross multiply
    12,947.80x = 19,421.70 × 9,667.30
  4. Step 4: Simplify right side
    12,947.80x = 187,755,400.41
  5. Step 5: Solve for x
    x = 187,755,400.41/12,947.80
  6. Step 6: Final answer
    x = 14,500.95

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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.