Home / 12,122.48-16,738.71-7,875.65

Finding the Fourth Proportional to 12,122.48, 16,738.71 and 7,875.65

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Solution

The fourth proportional to 12,122.48, 16,738.71 and 7,875.65 is: 10,874.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,122.48 : 16,738.71 = 7,875.65 : x
  2. Step 2: Convert to fraction form
    12,122.48/16,738.71 = 7,875.65/x
  3. Step 3: Cross multiply
    12,122.48x = 16,738.71 × 7,875.65
  4. Step 4: Simplify right side
    12,122.48x = 131,828,221.41
  5. Step 5: Solve for x
    x = 131,828,221.41/12,122.48
  6. Step 6: Final answer
    x = 10,874.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.