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Finding the Fourth Proportional to 21,917.77, 32,880.79 and 7,130.92

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Solution

The fourth proportional to 21,917.77, 32,880.79 and 7,130.92 is: 10,697.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,917.77 : 32,880.79 = 7,130.92 : x
  2. Step 2: Convert to fraction form
    21,917.77/32,880.79 = 7,130.92/x
  3. Step 3: Cross multiply
    21,917.77x = 32,880.79 × 7,130.92
  4. Step 4: Simplify right side
    21,917.77x = 234,470,231.28
  5. Step 5: Solve for x
    x = 234,470,231.28/21,917.77
  6. Step 6: Final answer
    x = 10,697.72

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1.5x scale

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.