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Finding the Fourth Proportional to 8,756.79, 12,084.01 and 5,172.91

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Solution

The fourth proportional to 8,756.79, 12,084.01 and 5,172.91 is: 7,138.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,756.79 : 12,084.01 = 5,172.91 : x
  2. Step 2: Convert to fraction form
    8,756.79/12,084.01 = 5,172.91/x
  3. Step 3: Cross multiply
    8,756.79x = 12,084.01 × 5,172.91
  4. Step 4: Simplify right side
    8,756.79x = 62,509,496.17
  5. Step 5: Solve for x
    x = 62,509,496.17/8,756.79
  6. Step 6: Final answer
    x = 7,138.40

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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.