Home / 20,670.72-28,525.76-11,239.30

Finding the Fourth Proportional to 20,670.72, 28,525.76 and 11,239.30

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Solution

The fourth proportional to 20,670.72, 28,525.76 and 11,239.30 is: 15,510.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.72 : 28,525.76 = 11,239.30 : x
  2. Step 2: Convert to fraction form
    20,670.72/28,525.76 = 11,239.30/x
  3. Step 3: Cross multiply
    20,670.72x = 28,525.76 × 11,239.30
  4. Step 4: Simplify right side
    20,670.72x = 320,609,574.37
  5. Step 5: Solve for x
    x = 320,609,574.37/20,670.72
  6. Step 6: Final answer
    x = 15,510.32

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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.