Home / 20,853.05-31,274.10-7,709.18

Finding the Fourth Proportional to 20,853.05, 31,274.10 and 7,709.18

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Solution

The fourth proportional to 20,853.05, 31,274.10 and 7,709.18 is: 11,561.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.05 : 31,274.10 = 7,709.18 : x
  2. Step 2: Convert to fraction form
    20,853.05/31,274.10 = 7,709.18/x
  3. Step 3: Cross multiply
    20,853.05x = 31,274.10 × 7,709.18
  4. Step 4: Simplify right side
    20,853.05x = 241,097,509.87
  5. Step 5: Solve for x
    x = 241,097,509.87/20,853.05
  6. Step 6: Final answer
    x = 11,561.74

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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.