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Finding the Fourth Proportional to 19,204.80, 28,807.20 and 5,353.80

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Solution

The fourth proportional to 19,204.80, 28,807.20 and 5,353.80 is: 8,030.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,204.80 : 28,807.20 = 5,353.80 : x
  2. Step 2: Convert to fraction form
    19,204.80/28,807.20 = 5,353.80/x
  3. Step 3: Cross multiply
    19,204.80x = 28,807.20 × 5,353.80
  4. Step 4: Simplify right side
    19,204.80x = 154,227,987.36
  5. Step 5: Solve for x
    x = 154,227,987.36/19,204.80
  6. Step 6: Final answer
    x = 8,030.70

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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.