Home / 20,393.42-28,142.86-11,320.16

Finding the Fourth Proportional to 20,393.42, 28,142.86 and 11,320.16

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Solution

The fourth proportional to 20,393.42, 28,142.86 and 11,320.16 is: 15,621.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.42 : 28,142.86 = 11,320.16 : x
  2. Step 2: Convert to fraction form
    20,393.42/28,142.86 = 11,320.16/x
  3. Step 3: Cross multiply
    20,393.42x = 28,142.86 × 11,320.16
  4. Step 4: Simplify right side
    20,393.42x = 318,581,678.06
  5. Step 5: Solve for x
    x = 318,581,678.06/20,393.42
  6. Step 6: Final answer
    x = 15,621.79

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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.