Home / 21,225.30-31,810.26-8,731.04

Finding the Fourth Proportional to 21,225.30, 31,810.26 and 8,731.04

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Solution

The fourth proportional to 21,225.30, 31,810.26 and 8,731.04 is: 13,085.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,225.30 : 31,810.26 = 8,731.04 : x
  2. Step 2: Convert to fraction form
    21,225.30/31,810.26 = 8,731.04/x
  3. Step 3: Cross multiply
    21,225.30x = 31,810.26 × 8,731.04
  4. Step 4: Simplify right side
    21,225.30x = 277,736,652.47
  5. Step 5: Solve for x
    x = 277,736,652.47/21,225.30
  6. Step 6: Final answer
    x = 13,085.17

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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.