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Finding the Fourth Proportional to 38,980.97, 53,793.72 and 21,075.97

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Solution

The fourth proportional to 38,980.97, 53,793.72 and 21,075.97 is: 29,084.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,980.97 : 53,793.72 = 21,075.97 : x
  2. Step 2: Convert to fraction form
    38,980.97/53,793.72 = 21,075.97/x
  3. Step 3: Cross multiply
    38,980.97x = 53,793.72 × 21,075.97
  4. Step 4: Simplify right side
    38,980.97x = 1,133,754,828.91
  5. Step 5: Solve for x
    x = 1,133,754,828.91/38,980.97
  6. Step 6: Final answer
    x = 29,084.83

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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.