Home / 20,670.60-28,525.62-11,239.20

Finding the Fourth Proportional to 20,670.60, 28,525.62 and 11,239.20

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Solution

The fourth proportional to 20,670.60, 28,525.62 and 11,239.20 is: 15,510.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.60 : 28,525.62 = 11,239.20 : x
  2. Step 2: Convert to fraction form
    20,670.60/28,525.62 = 11,239.20/x
  3. Step 3: Cross multiply
    20,670.60x = 28,525.62 × 11,239.20
  4. Step 4: Simplify right side
    20,670.60x = 320,605,148.30
  5. Step 5: Solve for x
    x = 320,605,148.30/20,670.60
  6. Step 6: Final answer
    x = 15,510.20

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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.