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Finding the Fourth Proportional to 15,065.55, 20,790.10 and 8,692.16

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Solution

The fourth proportional to 15,065.55, 20,790.10 and 8,692.16 is: 11,994.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,065.55 : 20,790.10 = 8,692.16 : x
  2. Step 2: Convert to fraction form
    15,065.55/20,790.10 = 8,692.16/x
  3. Step 3: Cross multiply
    15,065.55x = 20,790.10 × 8,692.16
  4. Step 4: Simplify right side
    15,065.55x = 180,710,782.53
  5. Step 5: Solve for x
    x = 180,710,782.53/15,065.55
  6. Step 6: Final answer
    x = 11,994.97

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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.