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Finding the Fourth Proportional to 38,940.53, 53,737.95 and 21,035.53

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Solution

The fourth proportional to 38,940.53, 53,737.95 and 21,035.53 is: 29,029.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,940.53 : 53,737.95 = 21,035.53 : x
  2. Step 2: Convert to fraction form
    38,940.53/53,737.95 = 21,035.53/x
  3. Step 3: Cross multiply
    38,940.53x = 53,737.95 × 21,035.53
  4. Step 4: Simplify right side
    38,940.53x = 1,130,405,885.50
  5. Step 5: Solve for x
    x = 1,130,405,885.50/38,940.53
  6. Step 6: Final answer
    x = 29,029.04

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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.