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Finding the Fourth Proportional to 8,574.30, 12,934.80 and 8,136.90

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Solution

The fourth proportional to 8,574.30, 12,934.80 and 8,136.90 is: 12,274.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,574.30 : 12,934.80 = 8,136.90 : x
  2. Step 2: Convert to fraction form
    8,574.30/12,934.80 = 8,136.90/x
  3. Step 3: Cross multiply
    8,574.30x = 12,934.80 × 8,136.90
  4. Step 4: Simplify right side
    8,574.30x = 105,249,174.12
  5. Step 5: Solve for x
    x = 105,249,174.12/8,574.30
  6. Step 6: Final answer
    x = 12,274.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.