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Finding the Fourth Proportional to 21,045.53, 29,043 and 11,485.49

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Solution

The fourth proportional to 21,045.53, 29,043 and 11,485.49 is: 15,850.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,045.53 : 29,043 = 11,485.49 : x
  2. Step 2: Convert to fraction form
    21,045.53/29,043 = 11,485.49/x
  3. Step 3: Cross multiply
    21,045.53x = 29,043 × 11,485.49
  4. Step 4: Simplify right side
    21,045.53x = 333,573,158.68
  5. Step 5: Solve for x
    x = 333,573,158.68/21,045.53
  6. Step 6: Final answer
    x = 15,850.07

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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.