Home / 39,865.59-55,013.93-21,960.61

Finding the Fourth Proportional to 39,865.59, 55,013.93 and 21,960.61

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Solution

The fourth proportional to 39,865.59, 55,013.93 and 21,960.61 is: 30,305.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,865.59 : 55,013.93 = 21,960.61 : x
  2. Step 2: Convert to fraction form
    39,865.59/55,013.93 = 21,960.61/x
  3. Step 3: Cross multiply
    39,865.59x = 55,013.93 × 21,960.61
  4. Step 4: Simplify right side
    39,865.59x = 1,208,139,502.61
  5. Step 5: Solve for x
    x = 1,208,139,502.61/39,865.59
  6. Step 6: Final answer
    x = 30,305.32

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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.