Home / 15,890.49-21,928.81-8,816.92

Finding the Fourth Proportional to 15,890.49, 21,928.81 and 8,816.92

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Solution

The fourth proportional to 15,890.49, 21,928.81 and 8,816.92 is: 12,167.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,890.49 : 21,928.81 = 8,816.92 : x
  2. Step 2: Convert to fraction form
    15,890.49/21,928.81 = 8,816.92/x
  3. Step 3: Cross multiply
    15,890.49x = 21,928.81 × 8,816.92
  4. Step 4: Simplify right side
    15,890.49x = 193,344,486.60
  5. Step 5: Solve for x
    x = 193,344,486.60/15,890.49
  6. Step 6: Final answer
    x = 12,167.31

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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.