Home / 21,455.12-32,187.36-8,975.72

Finding the Fourth Proportional to 21,455.12, 32,187.36 and 8,975.72

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Solution

The fourth proportional to 21,455.12, 32,187.36 and 8,975.72 is: 13,465.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,455.12 : 32,187.36 = 8,975.72 : x
  2. Step 2: Convert to fraction form
    21,455.12/32,187.36 = 8,975.72/x
  3. Step 3: Cross multiply
    21,455.12x = 32,187.36 × 8,975.72
  4. Step 4: Simplify right side
    21,455.12x = 288,904,730.90
  5. Step 5: Solve for x
    x = 288,904,730.90/21,455.12
  6. Step 6: Final answer
    x = 13,465.54

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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.