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Finding the Fourth Proportional to 19,188.40, 28,784.52 and 5,337.40

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Solution

The fourth proportional to 19,188.40, 28,784.52 and 5,337.40 is: 8,006.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,188.40 : 28,784.52 = 5,337.40 : x
  2. Step 2: Convert to fraction form
    19,188.40/28,784.52 = 5,337.40/x
  3. Step 3: Cross multiply
    19,188.40x = 28,784.52 × 5,337.40
  4. Step 4: Simplify right side
    19,188.40x = 153,634,497.05
  5. Step 5: Solve for x
    x = 153,634,497.05/19,188.40
  6. Step 6: Final answer
    x = 8,006.63

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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.