Home / 12,921.10-17,829.80-7,256.48

Finding the Fourth Proportional to 12,921.10, 17,829.80 and 7,256.48

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Solution

The fourth proportional to 12,921.10, 17,829.80 and 7,256.48 is: 10,013.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,921.10 : 17,829.80 = 7,256.48 : x
  2. Step 2: Convert to fraction form
    12,921.10/17,829.80 = 7,256.48/x
  3. Step 3: Cross multiply
    12,921.10x = 17,829.80 × 7,256.48
  4. Step 4: Simplify right side
    12,921.10x = 129,381,518.62
  5. Step 5: Solve for x
    x = 129,381,518.62/12,921.10
  6. Step 6: Final answer
    x = 10,013.19

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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.