Home / 9,107.07-12,567.63-5,128.57

Finding the Fourth Proportional to 9,107.07, 12,567.63 and 5,128.57

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Solution

The fourth proportional to 9,107.07, 12,567.63 and 5,128.57 is: 7,077.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,107.07 : 12,567.63 = 5,128.57 : x
  2. Step 2: Convert to fraction form
    9,107.07/12,567.63 = 5,128.57/x
  3. Step 3: Cross multiply
    9,107.07x = 12,567.63 × 5,128.57
  4. Step 4: Simplify right side
    9,107.07x = 64,453,970.19
  5. Step 5: Solve for x
    x = 64,453,970.19/9,107.07
  6. Step 6: Final answer
    x = 7,077.36

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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.