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Finding the Fourth Proportional to 8,555.65, 11,812.37 and 7,657.83

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Solution

The fourth proportional to 8,555.65, 11,812.37 and 7,657.83 is: 10,572.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,555.65 : 11,812.37 = 7,657.83 : x
  2. Step 2: Convert to fraction form
    8,555.65/11,812.37 = 7,657.83/x
  3. Step 3: Cross multiply
    8,555.65x = 11,812.37 × 7,657.83
  4. Step 4: Simplify right side
    8,555.65x = 90,457,083.07
  5. Step 5: Solve for x
    x = 90,457,083.07/8,555.65
  6. Step 6: Final answer
    x = 10,572.79

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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.