Home / 12,118.40-18,164.10-4,720.40

Finding the Fourth Proportional to 12,118.40, 18,164.10 and 4,720.40

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Solution

The fourth proportional to 12,118.40, 18,164.10 and 4,720.40 is: 7,075.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,118.40 : 18,164.10 = 4,720.40 : x
  2. Step 2: Convert to fraction form
    12,118.40/18,164.10 = 4,720.40/x
  3. Step 3: Cross multiply
    12,118.40x = 18,164.10 × 4,720.40
  4. Step 4: Simplify right side
    12,118.40x = 85,741,817.64
  5. Step 5: Solve for x
    x = 85,741,817.64/12,118.40
  6. Step 6: Final answer
    x = 7,075.34

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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.