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Finding the Fourth Proportional to 14,643.68, 20,208.52 and 8,271.56

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Solution

The fourth proportional to 14,643.68, 20,208.52 and 8,271.56 is: 11,414.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,643.68 : 20,208.52 = 8,271.56 : x
  2. Step 2: Convert to fraction form
    14,643.68/20,208.52 = 8,271.56/x
  3. Step 3: Cross multiply
    14,643.68x = 20,208.52 × 8,271.56
  4. Step 4: Simplify right side
    14,643.68x = 167,155,985.69
  5. Step 5: Solve for x
    x = 167,155,985.69/14,643.68
  6. Step 6: Final answer
    x = 11,414.89

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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.