Home / 20,565.03-28,379.75-11,133.59

Finding the Fourth Proportional to 20,565.03, 28,379.75 and 11,133.59

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Solution

The fourth proportional to 20,565.03, 28,379.75 and 11,133.59 is: 15,364.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.03 : 28,379.75 = 11,133.59 : x
  2. Step 2: Convert to fraction form
    20,565.03/28,379.75 = 11,133.59/x
  3. Step 3: Cross multiply
    20,565.03x = 28,379.75 × 11,133.59
  4. Step 4: Simplify right side
    20,565.03x = 315,968,445.13
  5. Step 5: Solve for x
    x = 315,968,445.13/20,565.03
  6. Step 6: Final answer
    x = 15,364.36

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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.