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Finding the Fourth Proportional to 28,996.47, 43,498.49 and 8,220.51

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Solution

The fourth proportional to 28,996.47, 43,498.49 and 8,220.51 is: 12,331.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,996.47 : 43,498.49 = 8,220.51 : x
  2. Step 2: Convert to fraction form
    28,996.47/43,498.49 = 8,220.51/x
  3. Step 3: Cross multiply
    28,996.47x = 43,498.49 × 8,220.51
  4. Step 4: Simplify right side
    28,996.47x = 357,579,730.93
  5. Step 5: Solve for x
    x = 357,579,730.93/28,996.47
  6. Step 6: Final answer
    x = 12,331.84

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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.