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Finding the Fourth Proportional to 9,898.91, 13,657.09 and 5,646.91

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Solution

The fourth proportional to 9,898.91, 13,657.09 and 5,646.91 is: 7,790.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,898.91 : 13,657.09 = 5,646.91 : x
  2. Step 2: Convert to fraction form
    9,898.91/13,657.09 = 5,646.91/x
  3. Step 3: Cross multiply
    9,898.91x = 13,657.09 × 5,646.91
  4. Step 4: Simplify right side
    9,898.91x = 77,120,283.79
  5. Step 5: Solve for x
    x = 77,120,283.79/9,898.91
  6. Step 6: Final answer
    x = 7,790.78

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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.