Home / 21,140.05-29,173.70-11,580.35

Finding the Fourth Proportional to 21,140.05, 29,173.70 and 11,580.35

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Solution

The fourth proportional to 21,140.05, 29,173.70 and 11,580.35 is: 15,981.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.05 : 29,173.70 = 11,580.35 : x
  2. Step 2: Convert to fraction form
    21,140.05/29,173.70 = 11,580.35/x
  3. Step 3: Cross multiply
    21,140.05x = 29,173.70 × 11,580.35
  4. Step 4: Simplify right side
    21,140.05x = 337,841,453.02
  5. Step 5: Solve for x
    x = 337,841,453.02/21,140.05
  6. Step 6: Final answer
    x = 15,981.11

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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.