Home / 15,766.40-21,756.64-8,692.88

Finding the Fourth Proportional to 15,766.40, 21,756.64 and 8,692.88

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Solution

The fourth proportional to 15,766.40, 21,756.64 and 8,692.88 is: 11,995.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,766.40 : 21,756.64 = 8,692.88 : x
  2. Step 2: Convert to fraction form
    15,766.40/21,756.64 = 8,692.88/x
  3. Step 3: Cross multiply
    15,766.40x = 21,756.64 × 8,692.88
  4. Step 4: Simplify right side
    15,766.40x = 189,127,860.72
  5. Step 5: Solve for x
    x = 189,127,860.72/15,766.40
  6. Step 6: Final answer
    x = 11,995.63

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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.