Home / 39,008.78-53,831.58-21,781.41

Finding the Fourth Proportional to 39,008.78, 53,831.58 and 21,781.41

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Solution

The fourth proportional to 39,008.78, 53,831.58 and 21,781.41 is: 30,058.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,008.78 : 53,831.58 = 21,781.41 : x
  2. Step 2: Convert to fraction form
    39,008.78/53,831.58 = 21,781.41/x
  3. Step 3: Cross multiply
    39,008.78x = 53,831.58 × 21,781.41
  4. Step 4: Simplify right side
    39,008.78x = 1,172,527,336.86
  5. Step 5: Solve for x
    x = 1,172,527,336.86/39,008.78
  6. Step 6: Final answer
    x = 30,058.04

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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.