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Finding the Fourth Proportional to 15,692.90, 21,662.37 and 9,404.06

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Solution

The fourth proportional to 15,692.90, 21,662.37 and 9,404.06 is: 12,981.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,692.90 : 21,662.37 = 9,404.06 : x
  2. Step 2: Convert to fraction form
    15,692.90/21,662.37 = 9,404.06/x
  3. Step 3: Cross multiply
    15,692.90x = 21,662.37 × 9,404.06
  4. Step 4: Simplify right side
    15,692.90x = 203,714,227.22
  5. Step 5: Solve for x
    x = 203,714,227.22/15,692.90
  6. Step 6: Final answer
    x = 12,981.30

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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.