Home / 20,595.60-28,420.07-11,643.89

Finding the Fourth Proportional to 20,595.60, 28,420.07 and 11,643.89

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Solution

The fourth proportional to 20,595.60, 28,420.07 and 11,643.89 is: 16,067.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,595.60 : 28,420.07 = 11,643.89 : x
  2. Step 2: Convert to fraction form
    20,595.60/28,420.07 = 11,643.89/x
  3. Step 3: Cross multiply
    20,595.60x = 28,420.07 × 11,643.89
  4. Step 4: Simplify right side
    20,595.60x = 330,919,968.55
  5. Step 5: Solve for x
    x = 330,919,968.55/20,595.60
  6. Step 6: Final answer
    x = 16,067.51

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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.