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Finding the Fourth Proportional to 15,007.80, 22,479.30 and 12,415.80

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Solution

The fourth proportional to 15,007.80, 22,479.30 and 12,415.80 is: 18,596.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,007.80 : 22,479.30 = 12,415.80 : x
  2. Step 2: Convert to fraction form
    15,007.80/22,479.30 = 12,415.80/x
  3. Step 3: Cross multiply
    15,007.80x = 22,479.30 × 12,415.80
  4. Step 4: Simplify right side
    15,007.80x = 279,098,492.94
  5. Step 5: Solve for x
    x = 279,098,492.94/15,007.80
  6. Step 6: Final answer
    x = 18,596.90

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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.