Home / 21,210.10-31,827.30-8,071.90

Finding the Fourth Proportional to 21,210.10, 31,827.30 and 8,071.90

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Solution

The fourth proportional to 21,210.10, 31,827.30 and 8,071.90 is: 12,112.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.10 : 31,827.30 = 8,071.90 : x
  2. Step 2: Convert to fraction form
    21,210.10/31,827.30 = 8,071.90/x
  3. Step 3: Cross multiply
    21,210.10x = 31,827.30 × 8,071.90
  4. Step 4: Simplify right side
    21,210.10x = 256,906,782.87
  5. Step 5: Solve for x
    x = 256,906,782.87/21,210.10
  6. Step 6: Final answer
    x = 12,112.47

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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.