Home / 39,895.19-55,055.73-21,990.87

Finding the Fourth Proportional to 39,895.19, 55,055.73 and 21,990.87

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Solution

The fourth proportional to 39,895.19, 55,055.73 and 21,990.87 is: 30,347.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,895.19 : 55,055.73 = 21,990.87 : x
  2. Step 2: Convert to fraction form
    39,895.19/55,055.73 = 21,990.87/x
  3. Step 3: Cross multiply
    39,895.19x = 55,055.73 × 21,990.87
  4. Step 4: Simplify right side
    39,895.19x = 1,210,723,401.19
  5. Step 5: Solve for x
    x = 1,210,723,401.19/39,895.19
  6. Step 6: Final answer
    x = 30,347.60

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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.