Home / 20,354.76-28,089.18-13,267.80

Finding the Fourth Proportional to 20,354.76, 28,089.18 and 13,267.80

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Solution

The fourth proportional to 20,354.76, 28,089.18 and 13,267.80 is: 18,309.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,354.76 : 28,089.18 = 13,267.80 : x
  2. Step 2: Convert to fraction form
    20,354.76/28,089.18 = 13,267.80/x
  3. Step 3: Cross multiply
    20,354.76x = 28,089.18 × 13,267.80
  4. Step 4: Simplify right side
    20,354.76x = 372,681,622.40
  5. Step 5: Solve for x
    x = 372,681,622.40/20,354.76
  6. Step 6: Final answer
    x = 18,309.31

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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.