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Finding the Fourth Proportional to 38,555.82, 53,207.01 and 21,788.82

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Solution

The fourth proportional to 38,555.82, 53,207.01 and 21,788.82 is: 30,068.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,555.82 : 53,207.01 = 21,788.82 : x
  2. Step 2: Convert to fraction form
    38,555.82/53,207.01 = 21,788.82/x
  3. Step 3: Cross multiply
    38,555.82x = 53,207.01 × 21,788.82
  4. Step 4: Simplify right side
    38,555.82x = 1,159,317,963.63
  5. Step 5: Solve for x
    x = 1,159,317,963.63/38,555.82
  6. Step 6: Final answer
    x = 30,068.56

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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.