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Finding the Fourth Proportional to 5,915.70, 8,870.70 and 2,215.57

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Solution

The fourth proportional to 5,915.70, 8,870.70 and 2,215.57 is: 3,322.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,915.70 : 8,870.70 = 2,215.57 : x
  2. Step 2: Convert to fraction form
    5,915.70/8,870.70 = 2,215.57/x
  3. Step 3: Cross multiply
    5,915.70x = 8,870.70 × 2,215.57
  4. Step 4: Simplify right side
    5,915.70x = 19,653,656.80
  5. Step 5: Solve for x
    x = 19,653,656.80/5,915.70
  6. Step 6: Final answer
    x = 3,322.29

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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.