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Finding the Fourth Proportional to 35,771.40, 53,639.82 and 20,985.12

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Solution

The fourth proportional to 35,771.40, 53,639.82 and 20,985.12 is: 31,467.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,771.40 : 53,639.82 = 20,985.12 : x
  2. Step 2: Convert to fraction form
    35,771.40/53,639.82 = 20,985.12/x
  3. Step 3: Cross multiply
    35,771.40x = 53,639.82 × 20,985.12
  4. Step 4: Simplify right side
    35,771.40x = 1,125,638,059.48
  5. Step 5: Solve for x
    x = 1,125,638,059.48/35,771.40
  6. Step 6: Final answer
    x = 31,467.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.