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Finding the Fourth Proportional to 51,392.28, 70,915.91 and 28,728.89

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Solution

The fourth proportional to 51,392.28, 70,915.91 and 28,728.89 is: 39,642.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,392.28 : 70,915.91 = 28,728.89 : x
  2. Step 2: Convert to fraction form
    51,392.28/70,915.91 = 28,728.89/x
  3. Step 3: Cross multiply
    51,392.28x = 70,915.91 × 28,728.89
  4. Step 4: Simplify right side
    51,392.28x = 2,037,334,879.42
  5. Step 5: Solve for x
    x = 2,037,334,879.42/51,392.28
  6. Step 6: Final answer
    x = 39,642.82

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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.