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Finding the Fourth Proportional to 8,784.80, 13,162.80 and 8,266.40

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Solution

The fourth proportional to 8,784.80, 13,162.80 and 8,266.40 is: 12,386.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,784.80 : 13,162.80 = 8,266.40 : x
  2. Step 2: Convert to fraction form
    8,784.80/13,162.80 = 8,266.40/x
  3. Step 3: Cross multiply
    8,784.80x = 13,162.80 × 8,266.40
  4. Step 4: Simplify right side
    8,784.80x = 108,808,969.92
  5. Step 5: Solve for x
    x = 108,808,969.92/8,784.80
  6. Step 6: Final answer
    x = 12,386.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.