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Finding the Fourth Proportional to 38,788, 53,527.44 and 21,124

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Solution

The fourth proportional to 38,788, 53,527.44 and 21,124 is: 29,151.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,788 : 53,527.44 = 21,124 : x
  2. Step 2: Convert to fraction form
    38,788/53,527.44 = 21,124/x
  3. Step 3: Cross multiply
    38,788x = 53,527.44 × 21,124
  4. Step 4: Simplify right side
    38,788x = 1,130,713,642.56
  5. Step 5: Solve for x
    x = 1,130,713,642.56/38,788
  6. Step 6: Final answer
    x = 29,151.12

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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.