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Finding the Fourth Proportional to 7,415.46, 11,070.28 and 7,155.94

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Solution

The fourth proportional to 7,415.46, 11,070.28 and 7,155.94 is: 10,682.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,415.46 : 11,070.28 = 7,155.94 : x
  2. Step 2: Convert to fraction form
    7,415.46/11,070.28 = 7,155.94/x
  3. Step 3: Cross multiply
    7,415.46x = 11,070.28 × 7,155.94
  4. Step 4: Simplify right side
    7,415.46x = 79,218,259.46
  5. Step 5: Solve for x
    x = 79,218,259.46/7,415.46
  6. Step 6: Final answer
    x = 10,682.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.