Home / 39,895.23-55,057.88-21,990.19

Finding the Fourth Proportional to 39,895.23, 55,057.88 and 21,990.19

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Solution

The fourth proportional to 39,895.23, 55,057.88 and 21,990.19 is: 30,347.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,895.23 : 55,057.88 = 21,990.19 : x
  2. Step 2: Convert to fraction form
    39,895.23/55,057.88 = 21,990.19/x
  3. Step 3: Cross multiply
    39,895.23x = 55,057.88 × 21,990.19
  4. Step 4: Simplify right side
    39,895.23x = 1,210,733,242.20
  5. Step 5: Solve for x
    x = 1,210,733,242.20/39,895.23
  6. Step 6: Final answer
    x = 30,347.82

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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.