Home / 11,434.48-15,780.32-6,399.16

Finding the Fourth Proportional to 11,434.48, 15,780.32 and 6,399.16

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Solution

The fourth proportional to 11,434.48, 15,780.32 and 6,399.16 is: 8,831.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,434.48 : 15,780.32 = 6,399.16 : x
  2. Step 2: Convert to fraction form
    11,434.48/15,780.32 = 6,399.16/x
  3. Step 3: Cross multiply
    11,434.48x = 15,780.32 × 6,399.16
  4. Step 4: Simplify right side
    11,434.48x = 100,980,792.53
  5. Step 5: Solve for x
    x = 100,980,792.53/11,434.48
  6. Step 6: Final answer
    x = 8,831.25

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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.