Home / 10,890.89-15,022.26-8,649.21

Finding the Fourth Proportional to 10,890.89, 15,022.26 and 8,649.21

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Solution

The fourth proportional to 10,890.89, 15,022.26 and 8,649.21 is: 11,930.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,890.89 : 15,022.26 = 8,649.21 : x
  2. Step 2: Convert to fraction form
    10,890.89/15,022.26 = 8,649.21/x
  3. Step 3: Cross multiply
    10,890.89x = 15,022.26 × 8,649.21
  4. Step 4: Simplify right side
    10,890.89x = 129,930,681.41
  5. Step 5: Solve for x
    x = 129,930,681.41/10,890.89
  6. Step 6: Final answer
    x = 11,930.22

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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.