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Finding the Fourth Proportional to 30,672.75, 46,006.56 and 8,486.40

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Solution

The fourth proportional to 30,672.75, 46,006.56 and 8,486.40 is: 12,728.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,672.75 : 46,006.56 = 8,486.40 : x
  2. Step 2: Convert to fraction form
    30,672.75/46,006.56 = 8,486.40/x
  3. Step 3: Cross multiply
    30,672.75x = 46,006.56 × 8,486.40
  4. Step 4: Simplify right side
    30,672.75x = 390,430,070.78
  5. Step 5: Solve for x
    x = 390,430,070.78/30,672.75
  6. Step 6: Final answer
    x = 12,728.89

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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.