Home / 13,440.12-20,109.48-12,075.92

Finding the Fourth Proportional to 13,440.12, 20,109.48 and 12,075.92

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Solution

The fourth proportional to 13,440.12, 20,109.48 and 12,075.92 is: 18,068.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,440.12 : 20,109.48 = 12,075.92 : x
  2. Step 2: Convert to fraction form
    13,440.12/20,109.48 = 12,075.92/x
  3. Step 3: Cross multiply
    13,440.12x = 20,109.48 × 12,075.92
  4. Step 4: Simplify right side
    13,440.12x = 242,840,471.72
  5. Step 5: Solve for x
    x = 242,840,471.72/13,440.12
  6. Step 6: Final answer
    x = 18,068.33

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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.