Home / 20,801.81-28,706.50-13,362.77

Finding the Fourth Proportional to 20,801.81, 28,706.50 and 13,362.77

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Solution

The fourth proportional to 20,801.81, 28,706.50 and 13,362.77 is: 18,440.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.81 : 28,706.50 = 13,362.77 : x
  2. Step 2: Convert to fraction form
    20,801.81/28,706.50 = 13,362.77/x
  3. Step 3: Cross multiply
    20,801.81x = 28,706.50 × 13,362.77
  4. Step 4: Simplify right side
    20,801.81x = 383,598,445.47
  5. Step 5: Solve for x
    x = 383,598,445.47/20,801.81
  6. Step 6: Final answer
    x = 18,440.63

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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.