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Finding the Fourth Proportional to 28,658.83, 42,981.81 and 12,037.63

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Solution

The fourth proportional to 28,658.83, 42,981.81 and 12,037.63 is: 18,053.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,658.83 : 42,981.81 = 12,037.63 : x
  2. Step 2: Convert to fraction form
    28,658.83/42,981.81 = 12,037.63/x
  3. Step 3: Cross multiply
    28,658.83x = 42,981.81 × 12,037.63
  4. Step 4: Simplify right side
    28,658.83x = 517,399,125.51
  5. Step 5: Solve for x
    x = 517,399,125.51/28,658.83
  6. Step 6: Final answer
    x = 18,053.74

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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.