Home / 8,688.02-11,980.68-7,727.90

Finding the Fourth Proportional to 8,688.02, 11,980.68 and 7,727.90

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Solution

The fourth proportional to 8,688.02, 11,980.68 and 7,727.90 is: 10,656.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.02 : 11,980.68 = 7,727.90 : x
  2. Step 2: Convert to fraction form
    8,688.02/11,980.68 = 7,727.90/x
  3. Step 3: Cross multiply
    8,688.02x = 11,980.68 × 7,727.90
  4. Step 4: Simplify right side
    8,688.02x = 92,585,496.97
  5. Step 5: Solve for x
    x = 92,585,496.97/8,688.02
  6. Step 6: Final answer
    x = 10,656.69

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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.