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Finding the Fourth Proportional to 21,035.30, 31,552.03 and 5,240.40

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Solution

The fourth proportional to 21,035.30, 31,552.03 and 5,240.40 is: 7,860.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,035.30 : 31,552.03 = 5,240.40 : x
  2. Step 2: Convert to fraction form
    21,035.30/31,552.03 = 5,240.40/x
  3. Step 3: Cross multiply
    21,035.30x = 31,552.03 × 5,240.40
  4. Step 4: Simplify right side
    21,035.30x = 165,345,146.24
  5. Step 5: Solve for x
    x = 165,345,146.24/21,035.30
  6. Step 6: Final answer
    x = 7,860.37

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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.