Home / 15,869.28-21,899.28-8,795.64

Finding the Fourth Proportional to 15,869.28, 21,899.28 and 8,795.64

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Solution

The fourth proportional to 15,869.28, 21,899.28 and 8,795.64 is: 12,137.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,869.28 : 21,899.28 = 8,795.64 : x
  2. Step 2: Convert to fraction form
    15,869.28/21,899.28 = 8,795.64/x
  3. Step 3: Cross multiply
    15,869.28x = 21,899.28 × 8,795.64
  4. Step 4: Simplify right side
    15,869.28x = 192,618,183.14
  5. Step 5: Solve for x
    x = 192,618,183.14/15,869.28
  6. Step 6: Final answer
    x = 12,137.80

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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.