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Finding the Fourth Proportional to 28,657.36, 42,985.63 and 8,936.11

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Solution

The fourth proportional to 28,657.36, 42,985.63 and 8,936.11 is: 13,404.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,657.36 : 42,985.63 = 8,936.11 : x
  2. Step 2: Convert to fraction form
    28,657.36/42,985.63 = 8,936.11/x
  3. Step 3: Cross multiply
    28,657.36x = 42,985.63 × 8,936.11
  4. Step 4: Simplify right side
    28,657.36x = 384,124,318.10
  5. Step 5: Solve for x
    x = 384,124,318.10/28,657.36
  6. Step 6: Final answer
    x = 13,404.04

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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.