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Finding the Fourth Proportional to 14,785.68, 20,404.84 and 8,071.76

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Solution

The fourth proportional to 14,785.68, 20,404.84 and 8,071.76 is: 11,139.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,785.68 : 20,404.84 = 8,071.76 : x
  2. Step 2: Convert to fraction form
    14,785.68/20,404.84 = 8,071.76/x
  3. Step 3: Cross multiply
    14,785.68x = 20,404.84 × 8,071.76
  4. Step 4: Simplify right side
    14,785.68x = 164,702,971.32
  5. Step 5: Solve for x
    x = 164,702,971.32/14,785.68
  6. Step 6: Final answer
    x = 11,139.36

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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.