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Finding the Fourth Proportional to 39,053.96, 53,894.49 and 21,148.98

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Solution

The fourth proportional to 39,053.96, 53,894.49 and 21,148.98 is: 29,185.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,053.96 : 53,894.49 = 21,148.98 : x
  2. Step 2: Convert to fraction form
    39,053.96/53,894.49 = 21,148.98/x
  3. Step 3: Cross multiply
    39,053.96x = 53,894.49 × 21,148.98
  4. Step 4: Simplify right side
    39,053.96x = 1,139,813,772.53
  5. Step 5: Solve for x
    x = 1,139,813,772.53/39,053.96
  6. Step 6: Final answer
    x = 29,185.61

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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.