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Finding the Fourth Proportional to 28,661.77, 43,009.05 and 11,129.32

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Solution

The fourth proportional to 28,661.77, 43,009.05 and 11,129.32 is: 16,700.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,661.77 : 43,009.05 = 11,129.32 : x
  2. Step 2: Convert to fraction form
    28,661.77/43,009.05 = 11,129.32/x
  3. Step 3: Cross multiply
    28,661.77x = 43,009.05 × 11,129.32
  4. Step 4: Simplify right side
    28,661.77x = 478,661,265.30
  5. Step 5: Solve for x
    x = 478,661,265.30/28,661.77
  6. Step 6: Final answer
    x = 16,700.34

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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.