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Finding the Fourth Proportional to 21,319.68, 31,993.74 and 7,468.68

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Solution

The fourth proportional to 21,319.68, 31,993.74 and 7,468.68 is: 11,208.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.68 : 31,993.74 = 7,468.68 : x
  2. Step 2: Convert to fraction form
    21,319.68/31,993.74 = 7,468.68/x
  3. Step 3: Cross multiply
    21,319.68x = 31,993.74 × 7,468.68
  4. Step 4: Simplify right side
    21,319.68x = 238,951,006.06
  5. Step 5: Solve for x
    x = 238,951,006.06/21,319.68
  6. Step 6: Final answer
    x = 11,208.00

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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.