Home / 12,915.32-19,369.74-5,516.12

Finding the Fourth Proportional to 12,915.32, 19,369.74 and 5,516.12

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Solution

The fourth proportional to 12,915.32, 19,369.74 and 5,516.12 is: 8,272.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,915.32 : 19,369.74 = 5,516.12 : x
  2. Step 2: Convert to fraction form
    12,915.32/19,369.74 = 5,516.12/x
  3. Step 3: Cross multiply
    12,915.32x = 19,369.74 × 5,516.12
  4. Step 4: Simplify right side
    12,915.32x = 106,845,810.21
  5. Step 5: Solve for x
    x = 106,845,810.21/12,915.32
  6. Step 6: Final answer
    x = 8,272.80

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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.