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Finding the Fourth Proportional to 21,302.60, 31,929.90 and 10,214.60

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Solution

The fourth proportional to 21,302.60, 31,929.90 and 10,214.60 is: 15,310.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,302.60 : 31,929.90 = 10,214.60 : x
  2. Step 2: Convert to fraction form
    21,302.60/31,929.90 = 10,214.60/x
  3. Step 3: Cross multiply
    21,302.60x = 31,929.90 × 10,214.60
  4. Step 4: Simplify right side
    21,302.60x = 326,151,156.54
  5. Step 5: Solve for x
    x = 326,151,156.54/21,302.60
  6. Step 6: Final answer
    x = 15,310.39

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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.