Home / 20,889.36-31,325.60-7,742.79

Finding the Fourth Proportional to 20,889.36, 31,325.60 and 7,742.79

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Solution

The fourth proportional to 20,889.36, 31,325.60 and 7,742.79 is: 11,611.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.36 : 31,325.60 = 7,742.79 : x
  2. Step 2: Convert to fraction form
    20,889.36/31,325.60 = 7,742.79/x
  3. Step 3: Cross multiply
    20,889.36x = 31,325.60 × 7,742.79
  4. Step 4: Simplify right side
    20,889.36x = 242,547,561.78
  5. Step 5: Solve for x
    x = 242,547,561.78/20,889.36
  6. Step 6: Final answer
    x = 11,611.06

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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.