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Finding the Fourth Proportional to 18,720.70, 28,069.05 and 8,847.10

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Solution

The fourth proportional to 18,720.70, 28,069.05 and 8,847.10 is: 13,264.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.70 : 28,069.05 = 8,847.10 : x
  2. Step 2: Convert to fraction form
    18,720.70/28,069.05 = 8,847.10/x
  3. Step 3: Cross multiply
    18,720.70x = 28,069.05 × 8,847.10
  4. Step 4: Simplify right side
    18,720.70x = 248,329,692.26
  5. Step 5: Solve for x
    x = 248,329,692.26/18,720.70
  6. Step 6: Final answer
    x = 13,264.98

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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.