Home / 28,193.72-38,907.18-15,618.36

Finding the Fourth Proportional to 28,193.72, 38,907.18 and 15,618.36

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Solution

The fourth proportional to 28,193.72, 38,907.18 and 15,618.36 is: 21,553.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,193.72 : 38,907.18 = 15,618.36 : x
  2. Step 2: Convert to fraction form
    28,193.72/38,907.18 = 15,618.36/x
  3. Step 3: Cross multiply
    28,193.72x = 38,907.18 × 15,618.36
  4. Step 4: Simplify right side
    28,193.72x = 607,666,343.82
  5. Step 5: Solve for x
    x = 607,666,343.82/28,193.72
  6. Step 6: Final answer
    x = 21,553.25

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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.