Home / 20,923.40-31,377.20-8,440.22

Finding the Fourth Proportional to 20,923.40, 31,377.20 and 8,440.22

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Solution

The fourth proportional to 20,923.40, 31,377.20 and 8,440.22 is: 12,657.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,923.40 : 31,377.20 = 8,440.22 : x
  2. Step 2: Convert to fraction form
    20,923.40/31,377.20 = 8,440.22/x
  3. Step 3: Cross multiply
    20,923.40x = 31,377.20 × 8,440.22
  4. Step 4: Simplify right side
    20,923.40x = 264,830,271.90
  5. Step 5: Solve for x
    x = 264,830,271.90/20,923.40
  6. Step 6: Final answer
    x = 12,657.14

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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.