Home / 11,436.18-15,780.36-6,400.18

Finding the Fourth Proportional to 11,436.18, 15,780.36 and 6,400.18

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Solution

The fourth proportional to 11,436.18, 15,780.36 and 6,400.18 is: 8,831.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,436.18 : 15,780.36 = 6,400.18 : x
  2. Step 2: Convert to fraction form
    11,436.18/15,780.36 = 6,400.18/x
  3. Step 3: Cross multiply
    11,436.18x = 15,780.36 × 6,400.18
  4. Step 4: Simplify right side
    11,436.18x = 100,997,144.46
  5. Step 5: Solve for x
    x = 100,997,144.46/11,436.18
  6. Step 6: Final answer
    x = 8,831.37

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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.