Home / 13,887.20-20,832.60-6,870.80

Finding the Fourth Proportional to 13,887.20, 20,832.60 and 6,870.80

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Solution

The fourth proportional to 13,887.20, 20,832.60 and 6,870.80 is: 10,307.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,887.20 : 20,832.60 = 6,870.80 : x
  2. Step 2: Convert to fraction form
    13,887.20/20,832.60 = 6,870.80/x
  3. Step 3: Cross multiply
    13,887.20x = 20,832.60 × 6,870.80
  4. Step 4: Simplify right side
    13,887.20x = 143,136,628.08
  5. Step 5: Solve for x
    x = 143,136,628.08/13,887.20
  6. Step 6: Final answer
    x = 10,307.09

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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.