Home / 31,831.20-47,746.80-21,808.80

Finding the Fourth Proportional to 31,831.20, 47,746.80 and 21,808.80

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Solution

The fourth proportional to 31,831.20, 47,746.80 and 21,808.80 is: 32,713.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,831.20 : 47,746.80 = 21,808.80 : x
  2. Step 2: Convert to fraction form
    31,831.20/47,746.80 = 21,808.80/x
  3. Step 3: Cross multiply
    31,831.20x = 47,746.80 × 21,808.80
  4. Step 4: Simplify right side
    31,831.20x = 1,041,300,411.84
  5. Step 5: Solve for x
    x = 1,041,300,411.84/31,831.20
  6. Step 6: Final answer
    x = 32,713.20

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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.