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Finding the Fourth Proportional to 15,692.43, 21,655.56 and 8,619.30

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Solution

The fourth proportional to 15,692.43, 21,655.56 and 8,619.30 is: 11,894.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,692.43 : 21,655.56 = 8,619.30 : x
  2. Step 2: Convert to fraction form
    15,692.43/21,655.56 = 8,619.30/x
  3. Step 3: Cross multiply
    15,692.43x = 21,655.56 × 8,619.30
  4. Step 4: Simplify right side
    15,692.43x = 186,655,768.31
  5. Step 5: Solve for x
    x = 186,655,768.31/15,692.43
  6. Step 6: Final answer
    x = 11,894.64

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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.