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Finding the Fourth Proportional to 39,018.60, 53,845.29 and 21,113.22

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Solution

The fourth proportional to 39,018.60, 53,845.29 and 21,113.22 is: 29,136.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,018.60 : 53,845.29 = 21,113.22 : x
  2. Step 2: Convert to fraction form
    39,018.60/53,845.29 = 21,113.22/x
  3. Step 3: Cross multiply
    39,018.60x = 53,845.29 × 21,113.22
  4. Step 4: Simplify right side
    39,018.60x = 1,136,847,453.73
  5. Step 5: Solve for x
    x = 1,136,847,453.73/39,018.60
  6. Step 6: Final answer
    x = 29,136.04

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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.