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Finding the Fourth Proportional to 8,715.01, 12,027.74 and 5,178.22

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Solution

The fourth proportional to 8,715.01, 12,027.74 and 5,178.22 is: 7,146.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,715.01 : 12,027.74 = 5,178.22 : x
  2. Step 2: Convert to fraction form
    8,715.01/12,027.74 = 5,178.22/x
  3. Step 3: Cross multiply
    8,715.01x = 12,027.74 × 5,178.22
  4. Step 4: Simplify right side
    8,715.01x = 62,282,283.82
  5. Step 5: Solve for x
    x = 62,282,283.82/8,715.01
  6. Step 6: Final answer
    x = 7,146.55

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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.