Home / 42,831.35-64,210.10-20,660.31

Finding the Fourth Proportional to 42,831.35, 64,210.10 and 20,660.31

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Solution

The fourth proportional to 42,831.35, 64,210.10 and 20,660.31 is: 30,972.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,831.35 : 64,210.10 = 20,660.31 : x
  2. Step 2: Convert to fraction form
    42,831.35/64,210.10 = 20,660.31/x
  3. Step 3: Cross multiply
    42,831.35x = 64,210.10 × 20,660.31
  4. Step 4: Simplify right side
    42,831.35x = 1,326,600,571.13
  5. Step 5: Solve for x
    x = 1,326,600,571.13/42,831.35
  6. Step 6: Final answer
    x = 30,972.65

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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.