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Finding the Fourth Proportional to 38,577.28, 53,238.08 and 21,809.28

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Solution

The fourth proportional to 38,577.28, 53,238.08 and 21,809.28 is: 30,097.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,577.28 : 53,238.08 = 21,809.28 : x
  2. Step 2: Convert to fraction form
    38,577.28/53,238.08 = 21,809.28/x
  3. Step 3: Cross multiply
    38,577.28x = 53,238.08 × 21,809.28
  4. Step 4: Simplify right side
    38,577.28x = 1,161,084,193.38
  5. Step 5: Solve for x
    x = 1,161,084,193.38/38,577.28
  6. Step 6: Final answer
    x = 30,097.62

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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.