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Finding the Fourth Proportional to 51,428.88, 70,972.92 and 28,768.32

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Solution

The fourth proportional to 51,428.88, 70,972.92 and 28,768.32 is: 39,700.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,428.88 : 70,972.92 = 28,768.32 : x
  2. Step 2: Convert to fraction form
    51,428.88/70,972.92 = 28,768.32/x
  3. Step 3: Cross multiply
    51,428.88x = 70,972.92 × 28,768.32
  4. Step 4: Simplify right side
    51,428.88x = 2,041,771,673.89
  5. Step 5: Solve for x
    x = 2,041,771,673.89/51,428.88
  6. Step 6: Final answer
    x = 39,700.88

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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.