Home / 20,570.98-28,388.08-11,139.54

Finding the Fourth Proportional to 20,570.98, 28,388.08 and 11,139.54

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Solution

The fourth proportional to 20,570.98, 28,388.08 and 11,139.54 is: 15,372.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,570.98 : 28,388.08 = 11,139.54 : x
  2. Step 2: Convert to fraction form
    20,570.98/28,388.08 = 11,139.54/x
  3. Step 3: Cross multiply
    20,570.98x = 28,388.08 × 11,139.54
  4. Step 4: Simplify right side
    20,570.98x = 316,230,152.68
  5. Step 5: Solve for x
    x = 316,230,152.68/20,570.98
  6. Step 6: Final answer
    x = 15,372.63

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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.