Home / 12,210.30-18,301.05-5,190.30

Finding the Fourth Proportional to 12,210.30, 18,301.05 and 5,190.30

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Solution

The fourth proportional to 12,210.30, 18,301.05 and 5,190.30 is: 7,779.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,210.30 : 18,301.05 = 5,190.30 : x
  2. Step 2: Convert to fraction form
    12,210.30/18,301.05 = 5,190.30/x
  3. Step 3: Cross multiply
    12,210.30x = 18,301.05 × 5,190.30
  4. Step 4: Simplify right side
    12,210.30x = 94,987,939.82
  5. Step 5: Solve for x
    x = 94,987,939.82/12,210.30
  6. Step 6: Final answer
    x = 7,779.33

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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.