Home / 21,126.36-29,155.08-12,173.16

Finding the Fourth Proportional to 21,126.36, 29,155.08 and 12,173.16

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Solution

The fourth proportional to 21,126.36, 29,155.08 and 12,173.16 is: 16,799.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.36 : 29,155.08 = 12,173.16 : x
  2. Step 2: Convert to fraction form
    21,126.36/29,155.08 = 12,173.16/x
  3. Step 3: Cross multiply
    21,126.36x = 29,155.08 × 12,173.16
  4. Step 4: Simplify right side
    21,126.36x = 354,909,453.65
  5. Step 5: Solve for x
    x = 354,909,453.65/21,126.36
  6. Step 6: Final answer
    x = 16,799.37

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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.