Home / 39,730.46-54,831.40-21,829.05

Finding the Fourth Proportional to 39,730.46, 54,831.40 and 21,829.05

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Solution

The fourth proportional to 39,730.46, 54,831.40 and 21,829.05 is: 30,125.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,730.46 : 54,831.40 = 21,829.05 : x
  2. Step 2: Convert to fraction form
    39,730.46/54,831.40 = 21,829.05/x
  3. Step 3: Cross multiply
    39,730.46x = 54,831.40 × 21,829.05
  4. Step 4: Simplify right side
    39,730.46x = 1,196,917,317.60
  5. Step 5: Solve for x
    x = 1,196,917,317.60/39,730.46
  6. Step 6: Final answer
    x = 30,125.94

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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.