Home / 21,140.53-29,174.28-11,580.28

Finding the Fourth Proportional to 21,140.53, 29,174.28 and 11,580.28

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Solution

The fourth proportional to 21,140.53, 29,174.28 and 11,580.28 is: 15,980.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.53 : 29,174.28 = 11,580.28 : x
  2. Step 2: Convert to fraction form
    21,140.53/29,174.28 = 11,580.28/x
  3. Step 3: Cross multiply
    21,140.53x = 29,174.28 × 11,580.28
  4. Step 4: Simplify right side
    21,140.53x = 337,846,331.20
  5. Step 5: Solve for x
    x = 337,846,331.20/21,140.53
  6. Step 6: Final answer
    x = 15,980.98

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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.