Home / 30,486.27-45,721.83-20,686.35

Finding the Fourth Proportional to 30,486.27, 45,721.83 and 20,686.35

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Solution

The fourth proportional to 30,486.27, 45,721.83 and 20,686.35 is: 31,024.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,486.27 : 45,721.83 = 20,686.35 : x
  2. Step 2: Convert to fraction form
    30,486.27/45,721.83 = 20,686.35/x
  3. Step 3: Cross multiply
    30,486.27x = 45,721.83 × 20,686.35
  4. Step 4: Simplify right side
    30,486.27x = 945,817,778.02
  5. Step 5: Solve for x
    x = 945,817,778.02/30,486.27
  6. Step 6: Final answer
    x = 31,024.39

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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.