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Finding the Fourth Proportional to 28,570.94, 42,855.95 and 7,794.44

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Solution

The fourth proportional to 28,570.94, 42,855.95 and 7,794.44 is: 11,691.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,570.94 : 42,855.95 = 7,794.44 : x
  2. Step 2: Convert to fraction form
    28,570.94/42,855.95 = 7,794.44/x
  3. Step 3: Cross multiply
    28,570.94x = 42,855.95 × 7,794.44
  4. Step 4: Simplify right side
    28,570.94x = 334,038,096.83
  5. Step 5: Solve for x
    x = 334,038,096.83/28,570.94
  6. Step 6: Final answer
    x = 11,691.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.