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Finding the Fourth Proportional to 15,215.60, 22,823.40 and 12,809.90

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Solution

The fourth proportional to 15,215.60, 22,823.40 and 12,809.90 is: 19,214.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,215.60 : 22,823.40 = 12,809.90 : x
  2. Step 2: Convert to fraction form
    15,215.60/22,823.40 = 12,809.90/x
  3. Step 3: Cross multiply
    15,215.60x = 22,823.40 × 12,809.90
  4. Step 4: Simplify right side
    15,215.60x = 292,365,471.66
  5. Step 5: Solve for x
    x = 292,365,471.66/15,215.60
  6. Step 6: Final answer
    x = 19,214.85

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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.