Home / 39,894.96-55,052.56-21,990.12

Finding the Fourth Proportional to 39,894.96, 55,052.56 and 21,990.12

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Solution

The fourth proportional to 39,894.96, 55,052.56 and 21,990.12 is: 30,345.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,894.96 : 55,052.56 = 21,990.12 : x
  2. Step 2: Convert to fraction form
    39,894.96/55,052.56 = 21,990.12/x
  3. Step 3: Cross multiply
    39,894.96x = 55,052.56 × 21,990.12
  4. Step 4: Simplify right side
    39,894.96x = 1,210,612,400.71
  5. Step 5: Solve for x
    x = 1,210,612,400.71/39,894.96
  6. Step 6: Final answer
    x = 30,345.00

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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.