Home / 39,864.84-55,017.80-21,961.68

Finding the Fourth Proportional to 39,864.84, 55,017.80 and 21,961.68

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Solution

The fourth proportional to 39,864.84, 55,017.80 and 21,961.68 is: 30,309.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,864.84 : 55,017.80 = 21,961.68 : x
  2. Step 2: Convert to fraction form
    39,864.84/55,017.80 = 21,961.68/x
  3. Step 3: Cross multiply
    39,864.84x = 55,017.80 × 21,961.68
  4. Step 4: Simplify right side
    39,864.84x = 1,208,283,317.90
  5. Step 5: Solve for x
    x = 1,208,283,317.90/39,864.84
  6. Step 6: Final answer
    x = 30,309.50

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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.