Home / 15,890.46-21,928.84-8,816.87

Finding the Fourth Proportional to 15,890.46, 21,928.84 and 8,816.87

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Solution

The fourth proportional to 15,890.46, 21,928.84 and 8,816.87 is: 12,167.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,890.46 : 21,928.84 = 8,816.87 : x
  2. Step 2: Convert to fraction form
    15,890.46/21,928.84 = 8,816.87/x
  3. Step 3: Cross multiply
    15,890.46x = 21,928.84 × 8,816.87
  4. Step 4: Simplify right side
    15,890.46x = 193,343,599.84
  5. Step 5: Solve for x
    x = 193,343,599.84/15,890.46
  6. Step 6: Final answer
    x = 12,167.28

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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.