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Finding the Fourth Proportional to 8,665.96, 12,940.48 and 8,574.40

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Solution

The fourth proportional to 8,665.96, 12,940.48 and 8,574.40 is: 12,803.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,665.96 : 12,940.48 = 8,574.40 : x
  2. Step 2: Convert to fraction form
    8,665.96/12,940.48 = 8,574.40/x
  3. Step 3: Cross multiply
    8,665.96x = 12,940.48 × 8,574.40
  4. Step 4: Simplify right side
    8,665.96x = 110,956,851.71
  5. Step 5: Solve for x
    x = 110,956,851.71/8,665.96
  6. Step 6: Final answer
    x = 12,803.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.