Home / 28,215.20-38,939.28-15,644

Finding the Fourth Proportional to 28,215.20, 38,939.28 and 15,644

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Solution

The fourth proportional to 28,215.20, 38,939.28 and 15,644 is: 21,590.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,215.20 : 38,939.28 = 15,644 : x
  2. Step 2: Convert to fraction form
    28,215.20/38,939.28 = 15,644/x
  3. Step 3: Cross multiply
    28,215.20x = 38,939.28 × 15,644
  4. Step 4: Simplify right side
    28,215.20x = 609,166,096.32
  5. Step 5: Solve for x
    x = 609,166,096.32/28,215.20
  6. Step 6: Final answer
    x = 21,590.00

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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.