Home / 15,465-21,321.76-12,629.38

Finding the Fourth Proportional to 15,465, 21,321.76 and 12,629.38

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Solution

The fourth proportional to 15,465, 21,321.76 and 12,629.38 is: 17,412.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,465 : 21,321.76 = 12,629.38 : x
  2. Step 2: Convert to fraction form
    15,465/21,321.76 = 12,629.38/x
  3. Step 3: Cross multiply
    15,465x = 21,321.76 × 12,629.38
  4. Step 4: Simplify right side
    15,465x = 269,280,609.31
  5. Step 5: Solve for x
    x = 269,280,609.31/15,465
  6. Step 6: Final answer
    x = 17,412.26

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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.