Home / 14,406.86-19,880.97-8,438.40

Finding the Fourth Proportional to 14,406.86, 19,880.97 and 8,438.40

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Solution

The fourth proportional to 14,406.86, 19,880.97 and 8,438.40 is: 11,644.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,406.86 : 19,880.97 = 8,438.40 : x
  2. Step 2: Convert to fraction form
    14,406.86/19,880.97 = 8,438.40/x
  3. Step 3: Cross multiply
    14,406.86x = 19,880.97 × 8,438.40
  4. Step 4: Simplify right side
    14,406.86x = 167,763,625.25
  5. Step 5: Solve for x
    x = 167,763,625.25/14,406.86
  6. Step 6: Final answer
    x = 11,644.70

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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.