Home / 11,291.79-15,585.26-7,515.12

Finding the Fourth Proportional to 11,291.79, 15,585.26 and 7,515.12

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Solution

The fourth proportional to 11,291.79, 15,585.26 and 7,515.12 is: 10,372.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,291.79 : 15,585.26 = 7,515.12 : x
  2. Step 2: Convert to fraction form
    11,291.79/15,585.26 = 7,515.12/x
  3. Step 3: Cross multiply
    11,291.79x = 15,585.26 × 7,515.12
  4. Step 4: Simplify right side
    11,291.79x = 117,125,061.56
  5. Step 5: Solve for x
    x = 117,125,061.56/11,291.79
  6. Step 6: Final answer
    x = 10,372.59

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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.