Home / 13,200.08-18,215.60-7,891.74

Finding the Fourth Proportional to 13,200.08, 18,215.60 and 7,891.74

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Solution

The fourth proportional to 13,200.08, 18,215.60 and 7,891.74 is: 10,890.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,200.08 : 18,215.60 = 7,891.74 : x
  2. Step 2: Convert to fraction form
    13,200.08/18,215.60 = 7,891.74/x
  3. Step 3: Cross multiply
    13,200.08x = 18,215.60 × 7,891.74
  4. Step 4: Simplify right side
    13,200.08x = 143,752,779.14
  5. Step 5: Solve for x
    x = 143,752,779.14/13,200.08
  6. Step 6: Final answer
    x = 10,890.30

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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.