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Finding the Fourth Proportional to 15,047.85, 20,764.30 and 8,674.39

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Solution

The fourth proportional to 15,047.85, 20,764.30 and 8,674.39 is: 11,969.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,047.85 : 20,764.30 = 8,674.39 : x
  2. Step 2: Convert to fraction form
    15,047.85/20,764.30 = 8,674.39/x
  3. Step 3: Cross multiply
    15,047.85x = 20,764.30 × 8,674.39
  4. Step 4: Simplify right side
    15,047.85x = 180,117,656.81
  5. Step 5: Solve for x
    x = 180,117,656.81/15,047.85
  6. Step 6: Final answer
    x = 11,969.66

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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.