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Finding the Fourth Proportional to 28,946.59, 43,420.62 and 7,886.80

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Solution

The fourth proportional to 28,946.59, 43,420.62 and 7,886.80 is: 11,830.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,946.59 : 43,420.62 = 7,886.80 : x
  2. Step 2: Convert to fraction form
    28,946.59/43,420.62 = 7,886.80/x
  3. Step 3: Cross multiply
    28,946.59x = 43,420.62 × 7,886.80
  4. Step 4: Simplify right side
    28,946.59x = 342,449,745.82
  5. Step 5: Solve for x
    x = 342,449,745.82/28,946.59
  6. Step 6: Final answer
    x = 11,830.40

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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.