Home / 12,681.32-19,021.84-3,915.24

Finding the Fourth Proportional to 12,681.32, 19,021.84 and 3,915.24

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Solution

The fourth proportional to 12,681.32, 19,021.84 and 3,915.24 is: 5,872.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,681.32 : 19,021.84 = 3,915.24 : x
  2. Step 2: Convert to fraction form
    12,681.32/19,021.84 = 3,915.24/x
  3. Step 3: Cross multiply
    12,681.32x = 19,021.84 × 3,915.24
  4. Step 4: Simplify right side
    12,681.32x = 74,475,068.84
  5. Step 5: Solve for x
    x = 74,475,068.84/12,681.32
  6. Step 6: Final answer
    x = 5,872.82

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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.