Home / 20,491.06-28,276.71-11,415.94

Finding the Fourth Proportional to 20,491.06, 28,276.71 and 11,415.94

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Solution

The fourth proportional to 20,491.06, 28,276.71 and 11,415.94 is: 15,753.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.06 : 28,276.71 = 11,415.94 : x
  2. Step 2: Convert to fraction form
    20,491.06/28,276.71 = 11,415.94/x
  3. Step 3: Cross multiply
    20,491.06x = 28,276.71 × 11,415.94
  4. Step 4: Simplify right side
    20,491.06x = 322,805,224.76
  5. Step 5: Solve for x
    x = 322,805,224.76/20,491.06
  6. Step 6: Final answer
    x = 15,753.47

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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.