Home / 20,818.93-28,722.05-13,263.91

Finding the Fourth Proportional to 20,818.93, 28,722.05 and 13,263.91

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Solution

The fourth proportional to 20,818.93, 28,722.05 and 13,263.91 is: 18,299.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.93 : 28,722.05 = 13,263.91 : x
  2. Step 2: Convert to fraction form
    20,818.93/28,722.05 = 13,263.91/x
  3. Step 3: Cross multiply
    20,818.93x = 28,722.05 × 13,263.91
  4. Step 4: Simplify right side
    20,818.93x = 380,966,542.61
  5. Step 5: Solve for x
    x = 380,966,542.61/20,818.93
  6. Step 6: Final answer
    x = 18,299.05

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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.