Home / 21,915.07-32,880.89-13,156.09

Finding the Fourth Proportional to 21,915.07, 32,880.89 and 13,156.09

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Solution

The fourth proportional to 21,915.07, 32,880.89 and 13,156.09 is: 19,739.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,915.07 : 32,880.89 = 13,156.09 : x
  2. Step 2: Convert to fraction form
    21,915.07/32,880.89 = 13,156.09/x
  3. Step 3: Cross multiply
    21,915.07x = 32,880.89 × 13,156.09
  4. Step 4: Simplify right side
    21,915.07x = 432,583,948.12
  5. Step 5: Solve for x
    x = 432,583,948.12/21,915.07
  6. Step 6: Final answer
    x = 19,739.11

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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.