Home / 21,225.75-31,840.65-8,746.62

Finding the Fourth Proportional to 21,225.75, 31,840.65 and 8,746.62

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Solution

The fourth proportional to 21,225.75, 31,840.65 and 8,746.62 is: 13,120.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,225.75 : 31,840.65 = 8,746.62 : x
  2. Step 2: Convert to fraction form
    21,225.75/31,840.65 = 8,746.62/x
  3. Step 3: Cross multiply
    21,225.75x = 31,840.65 × 8,746.62
  4. Step 4: Simplify right side
    21,225.75x = 278,498,066.10
  5. Step 5: Solve for x
    x = 278,498,066.10/21,225.75
  6. Step 6: Final answer
    x = 13,120.76

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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.