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Finding the Fourth Proportional to 10,521.52, 15,783.99 and 3,948.22

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Solution

The fourth proportional to 10,521.52, 15,783.99 and 3,948.22 is: 5,922.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,521.52 : 15,783.99 = 3,948.22 : x
  2. Step 2: Convert to fraction form
    10,521.52/15,783.99 = 3,948.22/x
  3. Step 3: Cross multiply
    10,521.52x = 15,783.99 × 3,948.22
  4. Step 4: Simplify right side
    10,521.52x = 62,318,636.63
  5. Step 5: Solve for x
    x = 62,318,636.63/10,521.52
  6. Step 6: Final answer
    x = 5,922.97

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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.