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Finding the Fourth Proportional to 8,395.35, 12,643.01 and 7,312.79

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Solution

The fourth proportional to 8,395.35, 12,643.01 and 7,312.79 is: 11,012.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,395.35 : 12,643.01 = 7,312.79 : x
  2. Step 2: Convert to fraction form
    8,395.35/12,643.01 = 7,312.79/x
  3. Step 3: Cross multiply
    8,395.35x = 12,643.01 × 7,312.79
  4. Step 4: Simplify right side
    8,395.35x = 92,455,677.10
  5. Step 5: Solve for x
    x = 92,455,677.10/8,395.35
  6. Step 6: Final answer
    x = 11,012.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.