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Finding the Fourth Proportional to 6,915.20, 10,372.80 and 6,051.20

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Solution

The fourth proportional to 6,915.20, 10,372.80 and 6,051.20 is: 9,076.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,915.20 : 10,372.80 = 6,051.20 : x
  2. Step 2: Convert to fraction form
    6,915.20/10,372.80 = 6,051.20/x
  3. Step 3: Cross multiply
    6,915.20x = 10,372.80 × 6,051.20
  4. Step 4: Simplify right side
    6,915.20x = 62,767,887.36
  5. Step 5: Solve for x
    x = 62,767,887.36/6,915.20
  6. Step 6: Final answer
    x = 9,076.80

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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.