Home / 8,515.40-11,751.48-5,157.50

Finding the Fourth Proportional to 8,515.40, 11,751.48 and 5,157.50

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Solution

The fourth proportional to 8,515.40, 11,751.48 and 5,157.50 is: 7,117.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,515.40 : 11,751.48 = 5,157.50 : x
  2. Step 2: Convert to fraction form
    8,515.40/11,751.48 = 5,157.50/x
  3. Step 3: Cross multiply
    8,515.40x = 11,751.48 × 5,157.50
  4. Step 4: Simplify right side
    8,515.40x = 60,608,258.10
  5. Step 5: Solve for x
    x = 60,608,258.10/8,515.40
  6. Step 6: Final answer
    x = 7,117.49

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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.