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Finding the Fourth Proportional to 28,712.82, 43,070.02 and 7,936.32

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Solution

The fourth proportional to 28,712.82, 43,070.02 and 7,936.32 is: 11,904.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,712.82 : 43,070.02 = 7,936.32 : x
  2. Step 2: Convert to fraction form
    28,712.82/43,070.02 = 7,936.32/x
  3. Step 3: Cross multiply
    28,712.82x = 43,070.02 × 7,936.32
  4. Step 4: Simplify right side
    28,712.82x = 341,817,461.13
  5. Step 5: Solve for x
    x = 341,817,461.13/28,712.82
  6. Step 6: Final answer
    x = 11,904.70

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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.