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Finding the Fourth Proportional to 28,137.80, 38,802.30 and 18,064.68

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Solution

The fourth proportional to 28,137.80, 38,802.30 and 18,064.68 is: 24,911.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,137.80 : 38,802.30 = 18,064.68 : x
  2. Step 2: Convert to fraction form
    28,137.80/38,802.30 = 18,064.68/x
  3. Step 3: Cross multiply
    28,137.80x = 38,802.30 × 18,064.68
  4. Step 4: Simplify right side
    28,137.80x = 700,951,132.76
  5. Step 5: Solve for x
    x = 700,951,132.76/28,137.80
  6. Step 6: Final answer
    x = 24,911.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.