Home / 20,491.87-28,278.01-11,417.01

Finding the Fourth Proportional to 20,491.87, 28,278.01 and 11,417.01

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Solution

The fourth proportional to 20,491.87, 28,278.01 and 11,417.01 is: 15,755.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.87 : 28,278.01 = 11,417.01 : x
  2. Step 2: Convert to fraction form
    20,491.87/28,278.01 = 11,417.01/x
  3. Step 3: Cross multiply
    20,491.87x = 28,278.01 × 11,417.01
  4. Step 4: Simplify right side
    20,491.87x = 322,850,501.88
  5. Step 5: Solve for x
    x = 322,850,501.88/20,491.87
  6. Step 6: Final answer
    x = 15,755.06

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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.