Home / 20,330.10-28,053.09-11,376.90

Finding the Fourth Proportional to 20,330.10, 28,053.09 and 11,376.90

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Solution

The fourth proportional to 20,330.10, 28,053.09 and 11,376.90 is: 15,698.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,330.10 : 28,053.09 = 11,376.90 : x
  2. Step 2: Convert to fraction form
    20,330.10/28,053.09 = 11,376.90/x
  3. Step 3: Cross multiply
    20,330.10x = 28,053.09 × 11,376.90
  4. Step 4: Simplify right side
    20,330.10x = 319,157,199.62
  5. Step 5: Solve for x
    x = 319,157,199.62/20,330.10
  6. Step 6: Final answer
    x = 15,698.75

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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.