Home / 15,919.85-21,969.80-8,749.72

Finding the Fourth Proportional to 15,919.85, 21,969.80 and 8,749.72

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Solution

The fourth proportional to 15,919.85, 21,969.80 and 8,749.72 is: 12,074.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,919.85 : 21,969.80 = 8,749.72 : x
  2. Step 2: Convert to fraction form
    15,919.85/21,969.80 = 8,749.72/x
  3. Step 3: Cross multiply
    15,919.85x = 21,969.80 × 8,749.72
  4. Step 4: Simplify right side
    15,919.85x = 192,229,598.46
  5. Step 5: Solve for x
    x = 192,229,598.46/15,919.85
  6. Step 6: Final answer
    x = 12,074.84

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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.