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Finding the Fourth Proportional to 14,078.99, 21,114.21 and 7,411.88

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Solution

The fourth proportional to 14,078.99, 21,114.21 and 7,411.88 is: 11,115.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,078.99 : 21,114.21 = 7,411.88 : x
  2. Step 2: Convert to fraction form
    14,078.99/21,114.21 = 7,411.88/x
  3. Step 3: Cross multiply
    14,078.99x = 21,114.21 × 7,411.88
  4. Step 4: Simplify right side
    14,078.99x = 156,495,990.81
  5. Step 5: Solve for x
    x = 156,495,990.81/14,078.99
  6. Step 6: Final answer
    x = 11,115.57

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1.5x scale

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.