Home / 39,735.81-54,836.40-21,831.97

Finding the Fourth Proportional to 39,735.81, 54,836.40 and 21,831.97

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Solution

The fourth proportional to 39,735.81, 54,836.40 and 21,831.97 is: 30,128.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,735.81 : 54,836.40 = 21,831.97 : x
  2. Step 2: Convert to fraction form
    39,735.81/54,836.40 = 21,831.97/x
  3. Step 3: Cross multiply
    39,735.81x = 54,836.40 × 21,831.97
  4. Step 4: Simplify right side
    39,735.81x = 1,197,186,639.71
  5. Step 5: Solve for x
    x = 1,197,186,639.71/39,735.81
  6. Step 6: Final answer
    x = 30,128.66

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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.