Home / 18,871.31-28,306.32-4,831.47

Finding the Fourth Proportional to 18,871.31, 28,306.32 and 4,831.47

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Solution

The fourth proportional to 18,871.31, 28,306.32 and 4,831.47 is: 7,247.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,871.31 : 28,306.32 = 4,831.47 : x
  2. Step 2: Convert to fraction form
    18,871.31/28,306.32 = 4,831.47/x
  3. Step 3: Cross multiply
    18,871.31x = 28,306.32 × 4,831.47
  4. Step 4: Simplify right side
    18,871.31x = 136,760,994.36
  5. Step 5: Solve for x
    x = 136,760,994.36/18,871.31
  6. Step 6: Final answer
    x = 7,247.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.