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Finding the Fourth Proportional to 15,907.20, 21,941.85 and 9,772.22

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Solution

The fourth proportional to 15,907.20, 21,941.85 and 9,772.22 is: 13,479.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,907.20 : 21,941.85 = 9,772.22 : x
  2. Step 2: Convert to fraction form
    15,907.20/21,941.85 = 9,772.22/x
  3. Step 3: Cross multiply
    15,907.20x = 21,941.85 × 9,772.22
  4. Step 4: Simplify right side
    15,907.20x = 214,420,475.70
  5. Step 5: Solve for x
    x = 214,420,475.70/15,907.20
  6. Step 6: Final answer
    x = 13,479.46

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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.