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Finding the Fourth Proportional to 8,574.40, 12,874.80 and 4,686.40

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Solution

The fourth proportional to 8,574.40, 12,874.80 and 4,686.40 is: 7,036.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,574.40 : 12,874.80 = 4,686.40 : x
  2. Step 2: Convert to fraction form
    8,574.40/12,874.80 = 4,686.40/x
  3. Step 3: Cross multiply
    8,574.40x = 12,874.80 × 4,686.40
  4. Step 4: Simplify right side
    8,574.40x = 60,336,462.72
  5. Step 5: Solve for x
    x = 60,336,462.72/8,574.40
  6. Step 6: Final answer
    x = 7,036.81

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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.