Home / 39,895.47-55,056.92-21,990.69

Finding the Fourth Proportional to 39,895.47, 55,056.92 and 21,990.69

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Solution

The fourth proportional to 39,895.47, 55,056.92 and 21,990.69 is: 30,347.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,895.47 : 55,056.92 = 21,990.69 : x
  2. Step 2: Convert to fraction form
    39,895.47/55,056.92 = 21,990.69/x
  3. Step 3: Cross multiply
    39,895.47x = 55,056.92 × 21,990.69
  4. Step 4: Simplify right side
    39,895.47x = 1,210,739,550.12
  5. Step 5: Solve for x
    x = 1,210,739,550.12/39,895.47
  6. Step 6: Final answer
    x = 30,347.80

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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.