Home / 39,870.60-55,023.93-21,965.58

Finding the Fourth Proportional to 39,870.60, 55,023.93 and 21,965.58

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Solution

The fourth proportional to 39,870.60, 55,023.93 and 21,965.58 is: 30,313.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,870.60 : 55,023.93 = 21,965.58 : x
  2. Step 2: Convert to fraction form
    39,870.60/55,023.93 = 21,965.58/x
  3. Step 3: Cross multiply
    39,870.60x = 55,023.93 × 21,965.58
  4. Step 4: Simplify right side
    39,870.60x = 1,208,632,536.33
  5. Step 5: Solve for x
    x = 1,208,632,536.33/39,870.60
  6. Step 6: Final answer
    x = 30,313.88

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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.