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Finding the Fourth Proportional to 28,768.68, 39,713.06 and 19,342.71

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Solution

The fourth proportional to 28,768.68, 39,713.06 and 19,342.71 is: 26,701.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,768.68 : 39,713.06 = 19,342.71 : x
  2. Step 2: Convert to fraction form
    28,768.68/39,713.06 = 19,342.71/x
  3. Step 3: Cross multiply
    28,768.68x = 39,713.06 × 19,342.71
  4. Step 4: Simplify right side
    28,768.68x = 768,158,251.15
  5. Step 5: Solve for x
    x = 768,158,251.15/28,768.68
  6. Step 6: Final answer
    x = 26,701.20

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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.