Home / 15,831.88-21,848.01-8,758.78

Finding the Fourth Proportional to 15,831.88, 21,848.01 and 8,758.78

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Solution

The fourth proportional to 15,831.88, 21,848.01 and 8,758.78 is: 12,087.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,831.88 : 21,848.01 = 8,758.78 : x
  2. Step 2: Convert to fraction form
    15,831.88/21,848.01 = 8,758.78/x
  3. Step 3: Cross multiply
    15,831.88x = 21,848.01 × 8,758.78
  4. Step 4: Simplify right side
    15,831.88x = 191,361,913.03
  5. Step 5: Solve for x
    x = 191,361,913.03/15,831.88
  6. Step 6: Final answer
    x = 12,087.13

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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.