Home / 15,629.78-21,569.13-8,556.65

Finding the Fourth Proportional to 15,629.78, 21,569.13 and 8,556.65

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Solution

The fourth proportional to 15,629.78, 21,569.13 and 8,556.65 is: 11,808.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,629.78 : 21,569.13 = 8,556.65 : x
  2. Step 2: Convert to fraction form
    15,629.78/21,569.13 = 8,556.65/x
  3. Step 3: Cross multiply
    15,629.78x = 21,569.13 × 8,556.65
  4. Step 4: Simplify right side
    15,629.78x = 184,559,453.43
  5. Step 5: Solve for x
    x = 184,559,453.43/15,629.78
  6. Step 6: Final answer
    x = 11,808.20

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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.