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Finding the Fourth Proportional to 28,712.88, 43,058.04 and 12,080.88

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Solution

The fourth proportional to 28,712.88, 43,058.04 and 12,080.88 is: 18,116.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,712.88 : 43,058.04 = 12,080.88 : x
  2. Step 2: Convert to fraction form
    28,712.88/43,058.04 = 12,080.88/x
  3. Step 3: Cross multiply
    28,712.88x = 43,058.04 × 12,080.88
  4. Step 4: Simplify right side
    28,712.88x = 520,179,014.28
  5. Step 5: Solve for x
    x = 520,179,014.28/28,712.88
  6. Step 6: Final answer
    x = 18,116.57

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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.