Home / 39,895.51-55,055.53-21,990.53

Finding the Fourth Proportional to 39,895.51, 55,055.53 and 21,990.53

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Solution

The fourth proportional to 39,895.51, 55,055.53 and 21,990.53 is: 30,346.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,895.51 : 55,055.53 = 21,990.53 : x
  2. Step 2: Convert to fraction form
    39,895.51/55,055.53 = 21,990.53/x
  3. Step 3: Cross multiply
    39,895.51x = 55,055.53 × 21,990.53
  4. Step 4: Simplify right side
    39,895.51x = 1,210,700,284.13
  5. Step 5: Solve for x
    x = 1,210,700,284.13/39,895.51
  6. Step 6: Final answer
    x = 30,346.78

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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.