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Finding the Fourth Proportional to 8,788.65, 12,151.67 and 7,681.48

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Solution

The fourth proportional to 8,788.65, 12,151.67 and 7,681.48 is: 10,620.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,788.65 : 12,151.67 = 7,681.48 : x
  2. Step 2: Convert to fraction form
    8,788.65/12,151.67 = 7,681.48/x
  3. Step 3: Cross multiply
    8,788.65x = 12,151.67 × 7,681.48
  4. Step 4: Simplify right side
    8,788.65x = 93,342,810.07
  5. Step 5: Solve for x
    x = 93,342,810.07/8,788.65
  6. Step 6: Final answer
    x = 10,620.84

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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.