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Finding the Fourth Proportional to 6,915.88, 10,372.24 and 1,985.48

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Solution

The fourth proportional to 6,915.88, 10,372.24 and 1,985.48 is: 2,977.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,915.88 : 10,372.24 = 1,985.48 : x
  2. Step 2: Convert to fraction form
    6,915.88/10,372.24 = 1,985.48/x
  3. Step 3: Cross multiply
    6,915.88x = 10,372.24 × 1,985.48
  4. Step 4: Simplify right side
    6,915.88x = 20,593,875.08
  5. Step 5: Solve for x
    x = 20,593,875.08/6,915.88
  6. Step 6: Final answer
    x = 2,977.77

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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.