Home / 15,831.94-21,843.36-9,117.39

Finding the Fourth Proportional to 15,831.94, 21,843.36 and 9,117.39

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Solution

The fourth proportional to 15,831.94, 21,843.36 and 9,117.39 is: 12,579.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,831.94 : 21,843.36 = 9,117.39 : x
  2. Step 2: Convert to fraction form
    15,831.94/21,843.36 = 9,117.39/x
  3. Step 3: Cross multiply
    15,831.94x = 21,843.36 × 9,117.39
  4. Step 4: Simplify right side
    15,831.94x = 199,154,432.03
  5. Step 5: Solve for x
    x = 199,154,432.03/15,831.94
  6. Step 6: Final answer
    x = 12,579.28

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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.