Home / 21,001.68-31,511.23-8,518.57

Finding the Fourth Proportional to 21,001.68, 31,511.23 and 8,518.57

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Solution

The fourth proportional to 21,001.68, 31,511.23 and 8,518.57 is: 12,781.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.68 : 31,511.23 = 8,518.57 : x
  2. Step 2: Convert to fraction form
    21,001.68/31,511.23 = 8,518.57/x
  3. Step 3: Cross multiply
    21,001.68x = 31,511.23 × 8,518.57
  4. Step 4: Simplify right side
    21,001.68x = 268,430,518.47
  5. Step 5: Solve for x
    x = 268,430,518.47/21,001.68
  6. Step 6: Final answer
    x = 12,781.38

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1.5x scale

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.