Home / 15,491.39-21,377.41-8,776.88

Finding the Fourth Proportional to 15,491.39, 21,377.41 and 8,776.88

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Solution

The fourth proportional to 15,491.39, 21,377.41 and 8,776.88 is: 12,111.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,491.39 : 21,377.41 = 8,776.88 : x
  2. Step 2: Convert to fraction form
    15,491.39/21,377.41 = 8,776.88/x
  3. Step 3: Cross multiply
    15,491.39x = 21,377.41 × 8,776.88
  4. Step 4: Simplify right side
    15,491.39x = 187,626,855.39
  5. Step 5: Solve for x
    x = 187,626,855.39/15,491.39
  6. Step 6: Final answer
    x = 12,111.69

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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.