Home / 11,291.89-15,585.40-7,515.21

Finding the Fourth Proportional to 11,291.89, 15,585.40 and 7,515.21

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Solution

The fourth proportional to 11,291.89, 15,585.40 and 7,515.21 is: 10,372.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,291.89 : 15,585.40 = 7,515.21 : x
  2. Step 2: Convert to fraction form
    11,291.89/15,585.40 = 7,515.21/x
  3. Step 3: Cross multiply
    11,291.89x = 15,585.40 × 7,515.21
  4. Step 4: Simplify right side
    11,291.89x = 117,127,579.50
  5. Step 5: Solve for x
    x = 117,127,579.50/11,291.89
  6. Step 6: Final answer
    x = 10,372.72

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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.