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Finding the Fourth Proportional to 15,118.79, 22,692.29 and 7,728.55

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Solution

The fourth proportional to 15,118.79, 22,692.29 and 7,728.55 is: 11,600.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,118.79 : 22,692.29 = 7,728.55 : x
  2. Step 2: Convert to fraction form
    15,118.79/22,692.29 = 7,728.55/x
  3. Step 3: Cross multiply
    15,118.79x = 22,692.29 × 7,728.55
  4. Step 4: Simplify right side
    15,118.79x = 175,378,402.51
  5. Step 5: Solve for x
    x = 175,378,402.51/15,118.79
  6. Step 6: Final answer
    x = 11,600.03

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1.5x scale

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.