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Finding the Fourth Proportional to 15,490.80, 23,197.80 and 12,418.80

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Solution

The fourth proportional to 15,490.80, 23,197.80 and 12,418.80 is: 18,597.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,490.80 : 23,197.80 = 12,418.80 : x
  2. Step 2: Convert to fraction form
    15,490.80/23,197.80 = 12,418.80/x
  3. Step 3: Cross multiply
    15,490.80x = 23,197.80 × 12,418.80
  4. Step 4: Simplify right side
    15,490.80x = 288,088,838.64
  5. Step 5: Solve for x
    x = 288,088,838.64/15,490.80
  6. Step 6: Final answer
    x = 18,597.42

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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.