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Finding the Fourth Proportional to 38,698.48, 53,400.17 and 21,703.42

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Solution

The fourth proportional to 38,698.48, 53,400.17 and 21,703.42 is: 29,948.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,698.48 : 53,400.17 = 21,703.42 : x
  2. Step 2: Convert to fraction form
    38,698.48/53,400.17 = 21,703.42/x
  3. Step 3: Cross multiply
    38,698.48x = 53,400.17 × 21,703.42
  4. Step 4: Simplify right side
    38,698.48x = 1,158,965,942.06
  5. Step 5: Solve for x
    x = 1,158,965,942.06/38,698.48
  6. Step 6: Final answer
    x = 29,948.62

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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.