Home / 39,875.60-55,028.49-21,969.74

Finding the Fourth Proportional to 39,875.60, 55,028.49 and 21,969.74

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Solution

The fourth proportional to 39,875.60, 55,028.49 and 21,969.74 is: 30,318.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,875.60 : 55,028.49 = 21,969.74 : x
  2. Step 2: Convert to fraction form
    39,875.60/55,028.49 = 21,969.74/x
  3. Step 3: Cross multiply
    39,875.60x = 55,028.49 × 21,969.74
  4. Step 4: Simplify right side
    39,875.60x = 1,208,961,617.89
  5. Step 5: Solve for x
    x = 1,208,961,617.89/39,875.60
  6. Step 6: Final answer
    x = 30,318.33

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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.