Home / 20,315.91-30,474.53-6,988.77

Finding the Fourth Proportional to 20,315.91, 30,474.53 and 6,988.77

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Solution

The fourth proportional to 20,315.91, 30,474.53 and 6,988.77 is: 10,483.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.91 : 30,474.53 = 6,988.77 : x
  2. Step 2: Convert to fraction form
    20,315.91/30,474.53 = 6,988.77/x
  3. Step 3: Cross multiply
    20,315.91x = 30,474.53 × 6,988.77
  4. Step 4: Simplify right side
    20,315.91x = 212,979,481.03
  5. Step 5: Solve for x
    x = 212,979,481.03/20,315.91
  6. Step 6: Final answer
    x = 10,483.38

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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.