Home / 39,864.30-55,012.32-21,958.92

Finding the Fourth Proportional to 39,864.30, 55,012.32 and 21,958.92

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Solution

The fourth proportional to 39,864.30, 55,012.32 and 21,958.92 is: 30,303.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,864.30 : 55,012.32 = 21,958.92 : x
  2. Step 2: Convert to fraction form
    39,864.30/55,012.32 = 21,958.92/x
  3. Step 3: Cross multiply
    39,864.30x = 55,012.32 × 21,958.92
  4. Step 4: Simplify right side
    39,864.30x = 1,208,011,133.89
  5. Step 5: Solve for x
    x = 1,208,011,133.89/39,864.30
  6. Step 6: Final answer
    x = 30,303.08

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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.