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Finding the Fourth Proportional to 5,607.72, 7,738.80 and 3,089.76

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Solution

The fourth proportional to 5,607.72, 7,738.80 and 3,089.76 is: 4,263.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,607.72 : 7,738.80 = 3,089.76 : x
  2. Step 2: Convert to fraction form
    5,607.72/7,738.80 = 3,089.76/x
  3. Step 3: Cross multiply
    5,607.72x = 7,738.80 × 3,089.76
  4. Step 4: Simplify right side
    5,607.72x = 23,911,034.69
  5. Step 5: Solve for x
    x = 23,911,034.69/5,607.72
  6. Step 6: Final answer
    x = 4,263.95

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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.