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Finding the Fourth Proportional to 14,712.68, 20,296.68 and 8,421.68

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Solution

The fourth proportional to 14,712.68, 20,296.68 and 8,421.68 is: 11,618.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,712.68 : 20,296.68 = 8,421.68 : x
  2. Step 2: Convert to fraction form
    14,712.68/20,296.68 = 8,421.68/x
  3. Step 3: Cross multiply
    14,712.68x = 20,296.68 × 8,421.68
  4. Step 4: Simplify right side
    14,712.68x = 170,932,144.02
  5. Step 5: Solve for x
    x = 170,932,144.02/14,712.68
  6. Step 6: Final answer
    x = 11,618.02

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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.