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Finding the Fourth Proportional to 21,573.34, 29,764.25 and 12,140.08

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Solution

The fourth proportional to 21,573.34, 29,764.25 and 12,140.08 is: 16,749.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,573.34 : 29,764.25 = 12,140.08 : x
  2. Step 2: Convert to fraction form
    21,573.34/29,764.25 = 12,140.08/x
  3. Step 3: Cross multiply
    21,573.34x = 29,764.25 × 12,140.08
  4. Step 4: Simplify right side
    21,573.34x = 361,340,227.32
  5. Step 5: Solve for x
    x = 361,340,227.32/21,573.34
  6. Step 6: Final answer
    x = 16,749.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.