Home / 21,140.67-29,173.88-11,709.15

Finding the Fourth Proportional to 21,140.67, 29,173.88 and 11,709.15

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Solution

The fourth proportional to 21,140.67, 29,173.88 and 11,709.15 is: 16,158.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.67 : 29,173.88 = 11,709.15 : x
  2. Step 2: Convert to fraction form
    21,140.67/29,173.88 = 11,709.15/x
  3. Step 3: Cross multiply
    21,140.67x = 29,173.88 × 11,709.15
  4. Step 4: Simplify right side
    21,140.67x = 341,601,278.46
  5. Step 5: Solve for x
    x = 341,601,278.46/21,140.67
  6. Step 6: Final answer
    x = 16,158.49

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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.