Home / 15,890.58-21,931.61-8,819.28

Finding the Fourth Proportional to 15,890.58, 21,931.61 and 8,819.28

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Solution

The fourth proportional to 15,890.58, 21,931.61 and 8,819.28 is: 12,172.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,890.58 : 21,931.61 = 8,819.28 : x
  2. Step 2: Convert to fraction form
    15,890.58/21,931.61 = 8,819.28/x
  3. Step 3: Cross multiply
    15,890.58x = 21,931.61 × 8,819.28
  4. Step 4: Simplify right side
    15,890.58x = 193,420,965.34
  5. Step 5: Solve for x
    x = 193,420,965.34/15,890.58
  6. Step 6: Final answer
    x = 12,172.05

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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.