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Finding the Fourth Proportional to 15,075.62, 20,808.63 and 9,107.67

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Solution

The fourth proportional to 15,075.62, 20,808.63 and 9,107.67 is: 12,571.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,075.62 : 20,808.63 = 9,107.67 : x
  2. Step 2: Convert to fraction form
    15,075.62/20,808.63 = 9,107.67/x
  3. Step 3: Cross multiply
    15,075.62x = 20,808.63 × 9,107.67
  4. Step 4: Simplify right side
    15,075.62x = 189,518,135.19
  5. Step 5: Solve for x
    x = 189,518,135.19/15,075.62
  6. Step 6: Final answer
    x = 12,571.17

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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.