Home / 15,869.71-21,899.44-9,157.49

Finding the Fourth Proportional to 15,869.71, 21,899.44 and 9,157.49

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Solution

The fourth proportional to 15,869.71, 21,899.44 and 9,157.49 is: 12,636.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,869.71 : 21,899.44 = 9,157.49 : x
  2. Step 2: Convert to fraction form
    15,869.71/21,899.44 = 9,157.49/x
  3. Step 3: Cross multiply
    15,869.71x = 21,899.44 × 9,157.49
  4. Step 4: Simplify right side
    15,869.71x = 200,543,969.00
  5. Step 5: Solve for x
    x = 200,543,969.00/15,869.71
  6. Step 6: Final answer
    x = 12,636.90

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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.