Home / 20,898.51-31,344.89-7,749.06

Finding the Fourth Proportional to 20,898.51, 31,344.89 and 7,749.06

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Solution

The fourth proportional to 20,898.51, 31,344.89 and 7,749.06 is: 11,622.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,898.51 : 31,344.89 = 7,749.06 : x
  2. Step 2: Convert to fraction form
    20,898.51/31,344.89 = 7,749.06/x
  3. Step 3: Cross multiply
    20,898.51x = 31,344.89 × 7,749.06
  4. Step 4: Simplify right side
    20,898.51x = 242,893,394.56
  5. Step 5: Solve for x
    x = 242,893,394.56/20,898.51
  6. Step 6: Final answer
    x = 11,622.52

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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.