Home / 21,481.40-32,208.86-7,438.16

Finding the Fourth Proportional to 21,481.40, 32,208.86 and 7,438.16

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Solution

The fourth proportional to 21,481.40, 32,208.86 and 7,438.16 is: 11,152.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,481.40 : 32,208.86 = 7,438.16 : x
  2. Step 2: Convert to fraction form
    21,481.40/32,208.86 = 7,438.16/x
  3. Step 3: Cross multiply
    21,481.40x = 32,208.86 × 7,438.16
  4. Step 4: Simplify right side
    21,481.40x = 239,574,455.86
  5. Step 5: Solve for x
    x = 239,574,455.86/21,481.40
  6. Step 6: Final answer
    x = 11,152.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.