Home / 21,110.02-31,640.22-8,615.77

Finding the Fourth Proportional to 21,110.02, 31,640.22 and 8,615.77

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Solution

The fourth proportional to 21,110.02, 31,640.22 and 8,615.77 is: 12,913.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.02 : 31,640.22 = 8,615.77 : x
  2. Step 2: Convert to fraction form
    21,110.02/31,640.22 = 8,615.77/x
  3. Step 3: Cross multiply
    21,110.02x = 31,640.22 × 8,615.77
  4. Step 4: Simplify right side
    21,110.02x = 272,604,779.17
  5. Step 5: Solve for x
    x = 272,604,779.17/21,110.02
  6. Step 6: Final answer
    x = 12,913.53

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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.