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Finding the Fourth Proportional to 15,907.37, 21,948.68 and 9,619.61

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Solution

The fourth proportional to 15,907.37, 21,948.68 and 9,619.61 is: 13,272.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,907.37 : 21,948.68 = 9,619.61 : x
  2. Step 2: Convert to fraction form
    15,907.37/21,948.68 = 9,619.61/x
  3. Step 3: Cross multiply
    15,907.37x = 21,948.68 × 9,619.61
  4. Step 4: Simplify right side
    15,907.37x = 211,137,655.92
  5. Step 5: Solve for x
    x = 211,137,655.92/15,907.37
  6. Step 6: Final answer
    x = 13,272.95

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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.