Home / 21,240.45-31,862.30-10,152.09

Finding the Fourth Proportional to 21,240.45, 31,862.30 and 10,152.09

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Solution

The fourth proportional to 21,240.45, 31,862.30 and 10,152.09 is: 15,228.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,240.45 : 31,862.30 = 10,152.09 : x
  2. Step 2: Convert to fraction form
    21,240.45/31,862.30 = 10,152.09/x
  3. Step 3: Cross multiply
    21,240.45x = 31,862.30 × 10,152.09
  4. Step 4: Simplify right side
    21,240.45x = 323,468,886.45
  5. Step 5: Solve for x
    x = 323,468,886.45/21,240.45
  6. Step 6: Final answer
    x = 15,228.91

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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.