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Finding the Fourth Proportional to 15,772.60, 21,758.58 and 9,811.24

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Solution

The fourth proportional to 15,772.60, 21,758.58 and 9,811.24 is: 13,534.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,772.60 : 21,758.58 = 9,811.24 : x
  2. Step 2: Convert to fraction form
    15,772.60/21,758.58 = 9,811.24/x
  3. Step 3: Cross multiply
    15,772.60x = 21,758.58 × 9,811.24
  4. Step 4: Simplify right side
    15,772.60x = 213,478,650.44
  5. Step 5: Solve for x
    x = 213,478,650.44/15,772.60
  6. Step 6: Final answer
    x = 13,534.78

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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.