Home / 12,129.75-16,746.35-7,945.29

Finding the Fourth Proportional to 12,129.75, 16,746.35 and 7,945.29

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Solution

The fourth proportional to 12,129.75, 16,746.35 and 7,945.29 is: 10,969.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.75 : 16,746.35 = 7,945.29 : x
  2. Step 2: Convert to fraction form
    12,129.75/16,746.35 = 7,945.29/x
  3. Step 3: Cross multiply
    12,129.75x = 16,746.35 × 7,945.29
  4. Step 4: Simplify right side
    12,129.75x = 133,054,567.47
  5. Step 5: Solve for x
    x = 133,054,567.47/12,129.75
  6. Step 6: Final answer
    x = 10,969.28

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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.