Home / 15,905.79-21,948.39-8,831.46

Finding the Fourth Proportional to 15,905.79, 21,948.39 and 8,831.46

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Solution

The fourth proportional to 15,905.79, 21,948.39 and 8,831.46 is: 12,186.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,905.79 : 21,948.39 = 8,831.46 : x
  2. Step 2: Convert to fraction form
    15,905.79/21,948.39 = 8,831.46/x
  3. Step 3: Cross multiply
    15,905.79x = 21,948.39 × 8,831.46
  4. Step 4: Simplify right side
    15,905.79x = 193,836,328.35
  5. Step 5: Solve for x
    x = 193,836,328.35/15,905.79
  6. Step 6: Final answer
    x = 12,186.53

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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.