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Finding the Fourth Proportional to 21,929.75, 32,898.68 and 6,940.64

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Solution

The fourth proportional to 21,929.75, 32,898.68 and 6,940.64 is: 10,412.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,929.75 : 32,898.68 = 6,940.64 : x
  2. Step 2: Convert to fraction form
    21,929.75/32,898.68 = 6,940.64/x
  3. Step 3: Cross multiply
    21,929.75x = 32,898.68 × 6,940.64
  4. Step 4: Simplify right side
    21,929.75x = 228,337,894.36
  5. Step 5: Solve for x
    x = 228,337,894.36/21,929.75
  6. Step 6: Final answer
    x = 10,412.24

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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.