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Finding the Fourth Proportional to 14,039.55, 21,041.12 and 5,709.87

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Solution

The fourth proportional to 14,039.55, 21,041.12 and 5,709.87 is: 8,557.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,039.55 : 21,041.12 = 5,709.87 : x
  2. Step 2: Convert to fraction form
    14,039.55/21,041.12 = 5,709.87/x
  3. Step 3: Cross multiply
    14,039.55x = 21,041.12 × 5,709.87
  4. Step 4: Simplify right side
    14,039.55x = 120,142,031.31
  5. Step 5: Solve for x
    x = 120,142,031.31/14,039.55
  6. Step 6: Final answer
    x = 8,557.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.