Home / 15,491.80-21,379.14-8,777.43

Finding the Fourth Proportional to 15,491.80, 21,379.14 and 8,777.43

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Solution

The fourth proportional to 15,491.80, 21,379.14 and 8,777.43 is: 12,113.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,491.80 : 21,379.14 = 8,777.43 : x
  2. Step 2: Convert to fraction form
    15,491.80/21,379.14 = 8,777.43/x
  3. Step 3: Cross multiply
    15,491.80x = 21,379.14 × 8,777.43
  4. Step 4: Simplify right side
    15,491.80x = 187,653,904.81
  5. Step 5: Solve for x
    x = 187,653,904.81/15,491.80
  6. Step 6: Final answer
    x = 12,113.11

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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.