Home / 20,583.90-28,403.55-15,209.19

Finding the Fourth Proportional to 20,583.90, 28,403.55 and 15,209.19

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Solution

The fourth proportional to 20,583.90, 28,403.55 and 15,209.19 is: 20,987.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,583.90 : 28,403.55 = 15,209.19 : x
  2. Step 2: Convert to fraction form
    20,583.90/28,403.55 = 15,209.19/x
  3. Step 3: Cross multiply
    20,583.90x = 28,403.55 × 15,209.19
  4. Step 4: Simplify right side
    20,583.90x = 431,994,988.62
  5. Step 5: Solve for x
    x = 431,994,988.62/20,583.90
  6. Step 6: Final answer
    x = 20,987.03

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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.