Home / 15,890.47-21,928.88-8,816.90

Finding the Fourth Proportional to 15,890.47, 21,928.88 and 8,816.90

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Solution

The fourth proportional to 15,890.47, 21,928.88 and 8,816.90 is: 12,167.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,890.47 : 21,928.88 = 8,816.90 : x
  2. Step 2: Convert to fraction form
    15,890.47/21,928.88 = 8,816.90/x
  3. Step 3: Cross multiply
    15,890.47x = 21,928.88 × 8,816.90
  4. Step 4: Simplify right side
    15,890.47x = 193,344,742.07
  5. Step 5: Solve for x
    x = 193,344,742.07/15,890.47
  6. Step 6: Final answer
    x = 12,167.34

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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.