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Finding the Fourth Proportional to 15,620.97, 21,556.97 and 8,547.45

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Solution

The fourth proportional to 15,620.97, 21,556.97 and 8,547.45 is: 11,795.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,620.97 : 21,556.97 = 8,547.45 : x
  2. Step 2: Convert to fraction form
    15,620.97/21,556.97 = 8,547.45/x
  3. Step 3: Cross multiply
    15,620.97x = 21,556.97 × 8,547.45
  4. Step 4: Simplify right side
    15,620.97x = 184,257,123.23
  5. Step 5: Solve for x
    x = 184,257,123.23/15,620.97
  6. Step 6: Final answer
    x = 11,795.50

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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.