Home / 20,301.89-28,006.35-13,587.80

Finding the Fourth Proportional to 20,301.89, 28,006.35 and 13,587.80

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Solution

The fourth proportional to 20,301.89, 28,006.35 and 13,587.80 is: 18,744.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,301.89 : 28,006.35 = 13,587.80 : x
  2. Step 2: Convert to fraction form
    20,301.89/28,006.35 = 13,587.80/x
  3. Step 3: Cross multiply
    20,301.89x = 28,006.35 × 13,587.80
  4. Step 4: Simplify right side
    20,301.89x = 380,544,682.53
  5. Step 5: Solve for x
    x = 380,544,682.53/20,301.89
  6. Step 6: Final answer
    x = 18,744.30

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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.