Home / 20,719.79-28,593.15-11,288.35

Finding the Fourth Proportional to 20,719.79, 28,593.15 and 11,288.35

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Solution

The fourth proportional to 20,719.79, 28,593.15 and 11,288.35 is: 15,577.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.79 : 28,593.15 = 11,288.35 : x
  2. Step 2: Convert to fraction form
    20,719.79/28,593.15 = 11,288.35/x
  3. Step 3: Cross multiply
    20,719.79x = 28,593.15 × 11,288.35
  4. Step 4: Simplify right side
    20,719.79x = 322,769,484.80
  5. Step 5: Solve for x
    x = 322,769,484.80/20,719.79
  6. Step 6: Final answer
    x = 15,577.84

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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.