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Finding the Fourth Proportional to 37,145.40, 51,261.08 and 20,378.40

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Solution

The fourth proportional to 37,145.40, 51,261.08 and 20,378.40 is: 28,122.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,145.40 : 51,261.08 = 20,378.40 : x
  2. Step 2: Convert to fraction form
    37,145.40/51,261.08 = 20,378.40/x
  3. Step 3: Cross multiply
    37,145.40x = 51,261.08 × 20,378.40
  4. Step 4: Simplify right side
    37,145.40x = 1,044,618,792.67
  5. Step 5: Solve for x
    x = 1,044,618,792.67/37,145.40
  6. Step 6: Final answer
    x = 28,122.43

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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.