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Finding the Fourth Proportional to 38,436.70, 53,042.62 and 21,669.70

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Solution

The fourth proportional to 38,436.70, 53,042.62 and 21,669.70 is: 29,904.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,436.70 : 53,042.62 = 21,669.70 : x
  2. Step 2: Convert to fraction form
    38,436.70/53,042.62 = 21,669.70/x
  3. Step 3: Cross multiply
    38,436.70x = 53,042.62 × 21,669.70
  4. Step 4: Simplify right side
    38,436.70x = 1,149,417,662.61
  5. Step 5: Solve for x
    x = 1,149,417,662.61/38,436.70
  6. Step 6: Final answer
    x = 29,904.17

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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.