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Finding the Fourth Proportional to 28,083, 38,754.81 and 15,508.56

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Solution

The fourth proportional to 28,083, 38,754.81 and 15,508.56 is: 21,401.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,083 : 38,754.81 = 15,508.56 : x
  2. Step 2: Convert to fraction form
    28,083/38,754.81 = 15,508.56/x
  3. Step 3: Cross multiply
    28,083x = 38,754.81 × 15,508.56
  4. Step 4: Simplify right side
    28,083x = 601,031,296.17
  5. Step 5: Solve for x
    x = 601,031,296.17/28,083
  6. Step 6: Final answer
    x = 21,401.96

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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.