Home / 13,128.98-19,699.32-6,887.54

Finding the Fourth Proportional to 13,128.98, 19,699.32 and 6,887.54

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Solution

The fourth proportional to 13,128.98, 19,699.32 and 6,887.54 is: 10,334.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.98 : 19,699.32 = 6,887.54 : x
  2. Step 2: Convert to fraction form
    13,128.98/19,699.32 = 6,887.54/x
  3. Step 3: Cross multiply
    13,128.98x = 19,699.32 × 6,887.54
  4. Step 4: Simplify right side
    13,128.98x = 135,679,854.47
  5. Step 5: Solve for x
    x = 135,679,854.47/13,128.98
  6. Step 6: Final answer
    x = 10,334.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.