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Finding the Fourth Proportional to 7,800.88, 10,772.44 and 5,011.28

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Solution

The fourth proportional to 7,800.88, 10,772.44 and 5,011.28 is: 6,920.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,800.88 : 10,772.44 = 5,011.28 : x
  2. Step 2: Convert to fraction form
    7,800.88/10,772.44 = 5,011.28/x
  3. Step 3: Cross multiply
    7,800.88x = 10,772.44 × 5,011.28
  4. Step 4: Simplify right side
    7,800.88x = 53,983,713.12
  5. Step 5: Solve for x
    x = 53,983,713.12/7,800.88
  6. Step 6: Final answer
    x = 6,920.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.