Home / 13,125.31-19,665.69-7,920.25

Finding the Fourth Proportional to 13,125.31, 19,665.69 and 7,920.25

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Solution

The fourth proportional to 13,125.31, 19,665.69 and 7,920.25 is: 11,866.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,125.31 : 19,665.69 = 7,920.25 : x
  2. Step 2: Convert to fraction form
    13,125.31/19,665.69 = 7,920.25/x
  3. Step 3: Cross multiply
    13,125.31x = 19,665.69 × 7,920.25
  4. Step 4: Simplify right side
    13,125.31x = 155,757,181.22
  5. Step 5: Solve for x
    x = 155,757,181.22/13,125.31
  6. Step 6: Final answer
    x = 11,866.93

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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.