Home / 21,140.10-29,173.86-11,580.48

Finding the Fourth Proportional to 21,140.10, 29,173.86 and 11,580.48

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Solution

The fourth proportional to 21,140.10, 29,173.86 and 11,580.48 is: 15,981.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.10 : 29,173.86 = 11,580.48 : x
  2. Step 2: Convert to fraction form
    21,140.10/29,173.86 = 11,580.48/x
  3. Step 3: Cross multiply
    21,140.10x = 29,173.86 × 11,580.48
  4. Step 4: Simplify right side
    21,140.10x = 337,847,302.25
  5. Step 5: Solve for x
    x = 337,847,302.25/21,140.10
  6. Step 6: Final answer
    x = 15,981.35

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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.