Home / 20,518.72-28,316.55-11,566.60

Finding the Fourth Proportional to 20,518.72, 28,316.55 and 11,566.60

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Solution

The fourth proportional to 20,518.72, 28,316.55 and 11,566.60 is: 15,962.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.72 : 28,316.55 = 11,566.60 : x
  2. Step 2: Convert to fraction form
    20,518.72/28,316.55 = 11,566.60/x
  3. Step 3: Cross multiply
    20,518.72x = 28,316.55 × 11,566.60
  4. Step 4: Simplify right side
    20,518.72x = 327,526,207.23
  5. Step 5: Solve for x
    x = 327,526,207.23/20,518.72
  6. Step 6: Final answer
    x = 15,962.31

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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.