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Finding the Fourth Proportional to 8,719.84, 13,089.12 and 3,529.12

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Solution

The fourth proportional to 8,719.84, 13,089.12 and 3,529.12 is: 5,297.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,719.84 : 13,089.12 = 3,529.12 : x
  2. Step 2: Convert to fraction form
    8,719.84/13,089.12 = 3,529.12/x
  3. Step 3: Cross multiply
    8,719.84x = 13,089.12 × 3,529.12
  4. Step 4: Simplify right side
    8,719.84x = 46,193,075.17
  5. Step 5: Solve for x
    x = 46,193,075.17/8,719.84
  6. Step 6: Final answer
    x = 5,297.47

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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.