Home / 45,931.20-68,896.80-19,638.60

Finding the Fourth Proportional to 45,931.20, 68,896.80 and 19,638.60

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Solution

The fourth proportional to 45,931.20, 68,896.80 and 19,638.60 is: 29,457.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,931.20 : 68,896.80 = 19,638.60 : x
  2. Step 2: Convert to fraction form
    45,931.20/68,896.80 = 19,638.60/x
  3. Step 3: Cross multiply
    45,931.20x = 68,896.80 × 19,638.60
  4. Step 4: Simplify right side
    45,931.20x = 1,353,036,696.48
  5. Step 5: Solve for x
    x = 1,353,036,696.48/45,931.20
  6. Step 6: Final answer
    x = 29,457.90

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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.