Home / 6,810.40-10,215.60-2,915.20

Finding the Fourth Proportional to 6,810.40, 10,215.60 and 2,915.20

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Solution

The fourth proportional to 6,810.40, 10,215.60 and 2,915.20 is: 4,372.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,810.40 : 10,215.60 = 2,915.20 : x
  2. Step 2: Convert to fraction form
    6,810.40/10,215.60 = 2,915.20/x
  3. Step 3: Cross multiply
    6,810.40x = 10,215.60 × 2,915.20
  4. Step 4: Simplify right side
    6,810.40x = 29,780,517.12
  5. Step 5: Solve for x
    x = 29,780,517.12/6,810.40
  6. Step 6: Final answer
    x = 4,372.80

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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.