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Finding the Fourth Proportional to 19,320.50, 28,980.76 and 5,469.50

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Solution

The fourth proportional to 19,320.50, 28,980.76 and 5,469.50 is: 8,204.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,320.50 : 28,980.76 = 5,469.50 : x
  2. Step 2: Convert to fraction form
    19,320.50/28,980.76 = 5,469.50/x
  3. Step 3: Cross multiply
    19,320.50x = 28,980.76 × 5,469.50
  4. Step 4: Simplify right side
    19,320.50x = 158,510,266.82
  5. Step 5: Solve for x
    x = 158,510,266.82/19,320.50
  6. Step 6: Final answer
    x = 8,204.25

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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.