Home / 20,820.03-31,222.20-6,776.40

Finding the Fourth Proportional to 20,820.03, 31,222.20 and 6,776.40

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Solution

The fourth proportional to 20,820.03, 31,222.20 and 6,776.40 is: 10,162.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.03 : 31,222.20 = 6,776.40 : x
  2. Step 2: Convert to fraction form
    20,820.03/31,222.20 = 6,776.40/x
  3. Step 3: Cross multiply
    20,820.03x = 31,222.20 × 6,776.40
  4. Step 4: Simplify right side
    20,820.03x = 211,574,116.08
  5. Step 5: Solve for x
    x = 211,574,116.08/20,820.03
  6. Step 6: Final answer
    x = 10,162.05

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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.