Home / 39,904.53-55,065.72-21,998.55

Finding the Fourth Proportional to 39,904.53, 55,065.72 and 21,998.55

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Solution

The fourth proportional to 39,904.53, 55,065.72 and 21,998.55 is: 30,356.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,904.53 : 55,065.72 = 21,998.55 : x
  2. Step 2: Convert to fraction form
    39,904.53/55,065.72 = 21,998.55/x
  3. Step 3: Cross multiply
    39,904.53x = 55,065.72 × 21,998.55
  4. Step 4: Simplify right side
    39,904.53x = 1,211,365,994.71
  5. Step 5: Solve for x
    x = 1,211,365,994.71/39,904.53
  6. Step 6: Final answer
    x = 30,356.60

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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.