Home / 18,980.29-26,191.65-11,429.07

Finding the Fourth Proportional to 18,980.29, 26,191.65 and 11,429.07

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Solution

The fourth proportional to 18,980.29, 26,191.65 and 11,429.07 is: 15,771.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,980.29 : 26,191.65 = 11,429.07 : x
  2. Step 2: Convert to fraction form
    18,980.29/26,191.65 = 11,429.07/x
  3. Step 3: Cross multiply
    18,980.29x = 26,191.65 × 11,429.07
  4. Step 4: Simplify right side
    18,980.29x = 299,346,145.91
  5. Step 5: Solve for x
    x = 299,346,145.91/18,980.29
  6. Step 6: Final answer
    x = 15,771.42

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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.