Home / 13,265.81-19,892.31-7,720.39

Finding the Fourth Proportional to 13,265.81, 19,892.31 and 7,720.39

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Solution

The fourth proportional to 13,265.81, 19,892.31 and 7,720.39 is: 11,576.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,265.81 : 19,892.31 = 7,720.39 : x
  2. Step 2: Convert to fraction form
    13,265.81/19,892.31 = 7,720.39/x
  3. Step 3: Cross multiply
    13,265.81x = 19,892.31 × 7,720.39
  4. Step 4: Simplify right side
    13,265.81x = 153,576,391.20
  5. Step 5: Solve for x
    x = 153,576,391.20/13,265.81
  6. Step 6: Final answer
    x = 11,576.86

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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.