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Finding the Fourth Proportional to 6,977.76, 9,621.63 and 5,915.04

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Solution

The fourth proportional to 6,977.76, 9,621.63 and 5,915.04 is: 8,156.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,977.76 : 9,621.63 = 5,915.04 : x
  2. Step 2: Convert to fraction form
    6,977.76/9,621.63 = 5,915.04/x
  3. Step 3: Cross multiply
    6,977.76x = 9,621.63 × 5,915.04
  4. Step 4: Simplify right side
    6,977.76x = 56,912,326.32
  5. Step 5: Solve for x
    x = 56,912,326.32/6,977.76
  6. Step 6: Final answer
    x = 8,156.25

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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.