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Finding the Fourth Proportional to 14,689.63, 20,271.68 and 8,065.63

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Solution

The fourth proportional to 14,689.63, 20,271.68 and 8,065.63 is: 11,130.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,689.63 : 20,271.68 = 8,065.63 : x
  2. Step 2: Convert to fraction form
    14,689.63/20,271.68 = 8,065.63/x
  3. Step 3: Cross multiply
    14,689.63x = 20,271.68 × 8,065.63
  4. Step 4: Simplify right side
    14,689.63x = 163,503,789.16
  5. Step 5: Solve for x
    x = 163,503,789.16/14,689.63
  6. Step 6: Final answer
    x = 11,130.56

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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.