Home / 9,107.66-12,567.67-5,128.70

Finding the Fourth Proportional to 9,107.66, 12,567.67 and 5,128.70

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Solution

The fourth proportional to 9,107.66, 12,567.67 and 5,128.70 is: 7,077.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,107.66 : 12,567.67 = 5,128.70 : x
  2. Step 2: Convert to fraction form
    9,107.66/12,567.67 = 5,128.70/x
  3. Step 3: Cross multiply
    9,107.66x = 12,567.67 × 5,128.70
  4. Step 4: Simplify right side
    9,107.66x = 64,455,733.47
  5. Step 5: Solve for x
    x = 64,455,733.47/9,107.66
  6. Step 6: Final answer
    x = 7,077.09

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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.