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Finding the Fourth Proportional to 15,626.51, 21,564.51 and 8,456.42

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Solution

The fourth proportional to 15,626.51, 21,564.51 and 8,456.42 is: 11,669.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,626.51 : 21,564.51 = 8,456.42 : x
  2. Step 2: Convert to fraction form
    15,626.51/21,564.51 = 8,456.42/x
  3. Step 3: Cross multiply
    15,626.51x = 21,564.51 × 8,456.42
  4. Step 4: Simplify right side
    15,626.51x = 182,358,607.57
  5. Step 5: Solve for x
    x = 182,358,607.57/15,626.51
  6. Step 6: Final answer
    x = 11,669.82

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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.