Home / 8,782.45-12,126.12-5,429.86

Finding the Fourth Proportional to 8,782.45, 12,126.12 and 5,429.86

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Solution

The fourth proportional to 8,782.45, 12,126.12 and 5,429.86 is: 7,497.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,782.45 : 12,126.12 = 5,429.86 : x
  2. Step 2: Convert to fraction form
    8,782.45/12,126.12 = 5,429.86/x
  3. Step 3: Cross multiply
    8,782.45x = 12,126.12 × 5,429.86
  4. Step 4: Simplify right side
    8,782.45x = 65,843,133.94
  5. Step 5: Solve for x
    x = 65,843,133.94/8,782.45
  6. Step 6: Final answer
    x = 7,497.13

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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.