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Finding the Fourth Proportional to 15,735.71, 21,715.34 and 9,021.48

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Solution

The fourth proportional to 15,735.71, 21,715.34 and 9,021.48 is: 12,449.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,735.71 : 21,715.34 = 9,021.48 : x
  2. Step 2: Convert to fraction form
    15,735.71/21,715.34 = 9,021.48/x
  3. Step 3: Cross multiply
    15,735.71x = 21,715.34 × 9,021.48
  4. Step 4: Simplify right side
    15,735.71x = 195,904,460.40
  5. Step 5: Solve for x
    x = 195,904,460.40/15,735.71
  6. Step 6: Final answer
    x = 12,449.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.