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Finding the Fourth Proportional to 21,065.76, 31,600.08 and 7,224.48

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Solution

The fourth proportional to 21,065.76, 31,600.08 and 7,224.48 is: 10,837.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,065.76 : 31,600.08 = 7,224.48 : x
  2. Step 2: Convert to fraction form
    21,065.76/31,600.08 = 7,224.48/x
  3. Step 3: Cross multiply
    21,065.76x = 31,600.08 × 7,224.48
  4. Step 4: Simplify right side
    21,065.76x = 228,294,145.96
  5. Step 5: Solve for x
    x = 228,294,145.96/21,065.76
  6. Step 6: Final answer
    x = 10,837.21

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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.