Home / 15,491.28-21,378.23-8,776.74

Finding the Fourth Proportional to 15,491.28, 21,378.23 and 8,776.74

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Solution

The fourth proportional to 15,491.28, 21,378.23 and 8,776.74 is: 12,112.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,491.28 : 21,378.23 = 8,776.74 : x
  2. Step 2: Convert to fraction form
    15,491.28/21,378.23 = 8,776.74/x
  3. Step 3: Cross multiply
    15,491.28x = 21,378.23 × 8,776.74
  4. Step 4: Simplify right side
    15,491.28x = 187,631,015.60
  5. Step 5: Solve for x
    x = 187,631,015.60/15,491.28
  6. Step 6: Final answer
    x = 12,112.04

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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.