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Finding the Fourth Proportional to 14,710.92, 20,300.57 and 8,422.08

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Solution

The fourth proportional to 14,710.92, 20,300.57 and 8,422.08 is: 11,622.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,710.92 : 20,300.57 = 8,422.08 : x
  2. Step 2: Convert to fraction form
    14,710.92/20,300.57 = 8,422.08/x
  3. Step 3: Cross multiply
    14,710.92x = 20,300.57 × 8,422.08
  4. Step 4: Simplify right side
    14,710.92x = 170,973,024.59
  5. Step 5: Solve for x
    x = 170,973,024.59/14,710.92
  6. Step 6: Final answer
    x = 11,622.18

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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.