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Finding the Fourth Proportional to 15,597.90, 21,518.97 and 9,619.20

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Solution

The fourth proportional to 15,597.90, 21,518.97 and 9,619.20 is: 13,270.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,597.90 : 21,518.97 = 9,619.20 : x
  2. Step 2: Convert to fraction form
    15,597.90/21,518.97 = 9,619.20/x
  3. Step 3: Cross multiply
    15,597.90x = 21,518.97 × 9,619.20
  4. Step 4: Simplify right side
    15,597.90x = 206,995,276.22
  5. Step 5: Solve for x
    x = 206,995,276.22/15,597.90
  6. Step 6: Final answer
    x = 13,270.71

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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.