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Finding the Fourth Proportional to 28,208, 38,927.04 and 15,633.56

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Solution

The fourth proportional to 28,208, 38,927.04 and 15,633.56 is: 21,574.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,208 : 38,927.04 = 15,633.56 : x
  2. Step 2: Convert to fraction form
    28,208/38,927.04 = 15,633.56/x
  3. Step 3: Cross multiply
    28,208x = 38,927.04 × 15,633.56
  4. Step 4: Simplify right side
    28,208x = 608,568,215.46
  5. Step 5: Solve for x
    x = 608,568,215.46/28,208
  6. Step 6: Final answer
    x = 21,574.31

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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.