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Finding the Fourth Proportional to 15,484.87, 21,368.63 and 8,771.11

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Solution

The fourth proportional to 15,484.87, 21,368.63 and 8,771.11 is: 12,103.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,484.87 : 21,368.63 = 8,771.11 : x
  2. Step 2: Convert to fraction form
    15,484.87/21,368.63 = 8,771.11/x
  3. Step 3: Cross multiply
    15,484.87x = 21,368.63 × 8,771.11
  4. Step 4: Simplify right side
    15,484.87x = 187,426,613.85
  5. Step 5: Solve for x
    x = 187,426,613.85/15,484.87
  6. Step 6: Final answer
    x = 12,103.86

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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.