Home / 15,871.23-21,900.83-8,797.05

Finding the Fourth Proportional to 15,871.23, 21,900.83 and 8,797.05

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Solution

The fourth proportional to 15,871.23, 21,900.83 and 8,797.05 is: 12,139.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,871.23 : 21,900.83 = 8,797.05 : x
  2. Step 2: Convert to fraction form
    15,871.23/21,900.83 = 8,797.05/x
  3. Step 3: Cross multiply
    15,871.23x = 21,900.83 × 8,797.05
  4. Step 4: Simplify right side
    15,871.23x = 192,662,652.57
  5. Step 5: Solve for x
    x = 192,662,652.57/15,871.23
  6. Step 6: Final answer
    x = 12,139.11

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Double scale
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Similar ratio
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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.