Home / 19,915.17-29,872.77-8,215.53

Finding the Fourth Proportional to 19,915.17, 29,872.77 and 8,215.53

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Solution

The fourth proportional to 19,915.17, 29,872.77 and 8,215.53 is: 12,323.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,915.17 : 29,872.77 = 8,215.53 : x
  2. Step 2: Convert to fraction form
    19,915.17/29,872.77 = 8,215.53/x
  3. Step 3: Cross multiply
    19,915.17x = 29,872.77 × 8,215.53
  4. Step 4: Simplify right side
    19,915.17x = 245,420,638.12
  5. Step 5: Solve for x
    x = 245,420,638.12/19,915.17
  6. Step 6: Final answer
    x = 12,323.30

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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.