Home / 11,355.54-15,666.28-8,378.47

Finding the Fourth Proportional to 11,355.54, 15,666.28 and 8,378.47

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Solution

The fourth proportional to 11,355.54, 15,666.28 and 8,378.47 is: 11,559.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,355.54 : 15,666.28 = 8,378.47 : x
  2. Step 2: Convert to fraction form
    11,355.54/15,666.28 = 8,378.47/x
  3. Step 3: Cross multiply
    11,355.54x = 15,666.28 × 8,378.47
  4. Step 4: Simplify right side
    11,355.54x = 131,259,456.99
  5. Step 5: Solve for x
    x = 131,259,456.99/11,355.54
  6. Step 6: Final answer
    x = 11,559.07

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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.