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Finding the Fourth Proportional to 19,204.80, 28,809.12 and 6,889.92

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Solution

The fourth proportional to 19,204.80, 28,809.12 and 6,889.92 is: 10,335.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,204.80 : 28,809.12 = 6,889.92 : x
  2. Step 2: Convert to fraction form
    19,204.80/28,809.12 = 6,889.92/x
  3. Step 3: Cross multiply
    19,204.80x = 28,809.12 × 6,889.92
  4. Step 4: Simplify right side
    19,204.80x = 198,492,532.07
  5. Step 5: Solve for x
    x = 198,492,532.07/19,204.80
  6. Step 6: Final answer
    x = 10,335.57

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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.