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Finding the Fourth Proportional to 15,692.32, 21,656.73 and 8,620.21

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Solution

The fourth proportional to 15,692.32, 21,656.73 and 8,620.21 is: 11,896.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,692.32 : 21,656.73 = 8,620.21 : x
  2. Step 2: Convert to fraction form
    15,692.32/21,656.73 = 8,620.21/x
  3. Step 3: Cross multiply
    15,692.32x = 21,656.73 × 8,620.21
  4. Step 4: Simplify right side
    15,692.32x = 186,685,560.51
  5. Step 5: Solve for x
    x = 186,685,560.51/15,692.32
  6. Step 6: Final answer
    x = 11,896.62

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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.