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Finding the Fourth Proportional to 7,772.70, 10,726.30 and 4,235.90

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Solution

The fourth proportional to 7,772.70, 10,726.30 and 4,235.90 is: 5,845.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,772.70 : 10,726.30 = 4,235.90 : x
  2. Step 2: Convert to fraction form
    7,772.70/10,726.30 = 4,235.90/x
  3. Step 3: Cross multiply
    7,772.70x = 10,726.30 × 4,235.90
  4. Step 4: Simplify right side
    7,772.70x = 45,435,526.06
  5. Step 5: Solve for x
    x = 45,435,526.06/7,772.70
  6. Step 6: Final answer
    x = 5,845.53

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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.