Home / 11,147.57-15,355.76-8,490.36

Finding the Fourth Proportional to 11,147.57, 15,355.76 and 8,490.36

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Solution

The fourth proportional to 11,147.57, 15,355.76 and 8,490.36 is: 11,695.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,147.57 : 15,355.76 = 8,490.36 : x
  2. Step 2: Convert to fraction form
    11,147.57/15,355.76 = 8,490.36/x
  3. Step 3: Cross multiply
    11,147.57x = 15,355.76 × 8,490.36
  4. Step 4: Simplify right side
    11,147.57x = 130,375,888.02
  5. Step 5: Solve for x
    x = 130,375,888.02/11,147.57
  6. Step 6: Final answer
    x = 11,695.46

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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.