Home / 28,036.80-38,711.52-19,664.64

Finding the Fourth Proportional to 28,036.80, 38,711.52 and 19,664.64

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Solution

The fourth proportional to 28,036.80, 38,711.52 and 19,664.64 is: 27,151.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,036.80 : 38,711.52 = 19,664.64 : x
  2. Step 2: Convert to fraction form
    28,036.80/38,711.52 = 19,664.64/x
  3. Step 3: Cross multiply
    28,036.80x = 38,711.52 × 19,664.64
  4. Step 4: Simplify right side
    28,036.80x = 761,248,104.65
  5. Step 5: Solve for x
    x = 761,248,104.65/28,036.80
  6. Step 6: Final answer
    x = 27,151.75

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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.