Home / 15,206.32-20,985.16-8,491.76

Finding the Fourth Proportional to 15,206.32, 20,985.16 and 8,491.76

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Solution

The fourth proportional to 15,206.32, 20,985.16 and 8,491.76 is: 11,718.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,206.32 : 20,985.16 = 8,491.76 : x
  2. Step 2: Convert to fraction form
    15,206.32/20,985.16 = 8,491.76/x
  3. Step 3: Cross multiply
    15,206.32x = 20,985.16 × 8,491.76
  4. Step 4: Simplify right side
    15,206.32x = 178,200,942.28
  5. Step 5: Solve for x
    x = 178,200,942.28/15,206.32
  6. Step 6: Final answer
    x = 11,718.87

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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.