Home / 21,140.81-29,173.29-11,580.75

Finding the Fourth Proportional to 21,140.81, 29,173.29 and 11,580.75

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Solution

The fourth proportional to 21,140.81, 29,173.29 and 11,580.75 is: 15,980.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.81 : 29,173.29 = 11,580.75 : x
  2. Step 2: Convert to fraction form
    21,140.81/29,173.29 = 11,580.75/x
  3. Step 3: Cross multiply
    21,140.81x = 29,173.29 × 11,580.75
  4. Step 4: Simplify right side
    21,140.81x = 337,848,669.87
  5. Step 5: Solve for x
    x = 337,848,669.87/21,140.81
  6. Step 6: Final answer
    x = 15,980.88

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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.