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Finding the Fourth Proportional to 9,855.20, 14,761.20 and 5,228.48

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Solution

The fourth proportional to 9,855.20, 14,761.20 and 5,228.48 is: 7,831.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,855.20 : 14,761.20 = 5,228.48 : x
  2. Step 2: Convert to fraction form
    9,855.20/14,761.20 = 5,228.48/x
  3. Step 3: Cross multiply
    9,855.20x = 14,761.20 × 5,228.48
  4. Step 4: Simplify right side
    9,855.20x = 77,178,638.98
  5. Step 5: Solve for x
    x = 77,178,638.98/9,855.20
  6. Step 6: Final answer
    x = 7,831.26

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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.