Home / 6,915.60-10,365.20-3,987.86

Finding the Fourth Proportional to 6,915.60, 10,365.20 and 3,987.86

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Solution

The fourth proportional to 6,915.60, 10,365.20 and 3,987.86 is: 5,977.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,915.60 : 10,365.20 = 3,987.86 : x
  2. Step 2: Convert to fraction form
    6,915.60/10,365.20 = 3,987.86/x
  3. Step 3: Cross multiply
    6,915.60x = 10,365.20 × 3,987.86
  4. Step 4: Simplify right side
    6,915.60x = 41,334,894.71
  5. Step 5: Solve for x
    x = 41,334,894.71/6,915.60
  6. Step 6: Final answer
    x = 5,977.05

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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.