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Finding the Fourth Proportional to 28,458.83, 42,692.84 and 10,690.87

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Solution

The fourth proportional to 28,458.83, 42,692.84 and 10,690.87 is: 16,038.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,458.83 : 42,692.84 = 10,690.87 : x
  2. Step 2: Convert to fraction form
    28,458.83/42,692.84 = 10,690.87/x
  3. Step 3: Cross multiply
    28,458.83x = 42,692.84 × 10,690.87
  4. Step 4: Simplify right side
    28,458.83x = 456,423,602.37
  5. Step 5: Solve for x
    x = 456,423,602.37/28,458.83
  6. Step 6: Final answer
    x = 16,038.03

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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.