Home / 8,782.46-12,114.25-6,128.90

Finding the Fourth Proportional to 8,782.46, 12,114.25 and 6,128.90

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Solution

The fourth proportional to 8,782.46, 12,114.25 and 6,128.90 is: 8,454.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,782.46 : 12,114.25 = 6,128.90 : x
  2. Step 2: Convert to fraction form
    8,782.46/12,114.25 = 6,128.90/x
  3. Step 3: Cross multiply
    8,782.46x = 12,114.25 × 6,128.90
  4. Step 4: Simplify right side
    8,782.46x = 74,246,935.61
  5. Step 5: Solve for x
    x = 74,246,935.61/8,782.46
  6. Step 6: Final answer
    x = 8,454.01

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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.