Home / 21,237.59-31,851.68-12,887.66

Finding the Fourth Proportional to 21,237.59, 31,851.68 and 12,887.66

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Solution

The fourth proportional to 21,237.59, 31,851.68 and 12,887.66 is: 19,328.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,237.59 : 31,851.68 = 12,887.66 : x
  2. Step 2: Convert to fraction form
    21,237.59/31,851.68 = 12,887.66/x
  3. Step 3: Cross multiply
    21,237.59x = 31,851.68 × 12,887.66
  4. Step 4: Simplify right side
    21,237.59x = 410,493,530.79
  5. Step 5: Solve for x
    x = 410,493,530.79/21,237.59
  6. Step 6: Final answer
    x = 19,328.63

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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.