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Finding the Fourth Proportional to 8,685.54, 13,020.12 and 2,838.06

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Solution

The fourth proportional to 8,685.54, 13,020.12 and 2,838.06 is: 4,254.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685.54 : 13,020.12 = 2,838.06 : x
  2. Step 2: Convert to fraction form
    8,685.54/13,020.12 = 2,838.06/x
  3. Step 3: Cross multiply
    8,685.54x = 13,020.12 × 2,838.06
  4. Step 4: Simplify right side
    8,685.54x = 36,951,881.77
  5. Step 5: Solve for x
    x = 36,951,881.77/8,685.54
  6. Step 6: Final answer
    x = 4,254.41

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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.