Home / 12,726.65-18,947.45-12,665.09

Finding the Fourth Proportional to 12,726.65, 18,947.45 and 12,665.09

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Solution

The fourth proportional to 12,726.65, 18,947.45 and 12,665.09 is: 18,855.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,726.65 : 18,947.45 = 12,665.09 : x
  2. Step 2: Convert to fraction form
    12,726.65/18,947.45 = 12,665.09/x
  3. Step 3: Cross multiply
    12,726.65x = 18,947.45 × 12,665.09
  4. Step 4: Simplify right side
    12,726.65x = 239,971,238.55
  5. Step 5: Solve for x
    x = 239,971,238.55/12,726.65
  6. Step 6: Final answer
    x = 18,855.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.