Home / 13,678.30-18,876.90-7,629.22

Finding the Fourth Proportional to 13,678.30, 18,876.90 and 7,629.22

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Solution

The fourth proportional to 13,678.30, 18,876.90 and 7,629.22 is: 10,528.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.30 : 18,876.90 = 7,629.22 : x
  2. Step 2: Convert to fraction form
    13,678.30/18,876.90 = 7,629.22/x
  3. Step 3: Cross multiply
    13,678.30x = 18,876.90 × 7,629.22
  4. Step 4: Simplify right side
    13,678.30x = 144,016,023.02
  5. Step 5: Solve for x
    x = 144,016,023.02/13,678.30
  6. Step 6: Final answer
    x = 10,528.80

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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.