Home / 20,510.88-30,771.12-8,817.60

Finding the Fourth Proportional to 20,510.88, 30,771.12 and 8,817.60

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Solution

The fourth proportional to 20,510.88, 30,771.12 and 8,817.60 is: 13,228.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.88 : 30,771.12 = 8,817.60 : x
  2. Step 2: Convert to fraction form
    20,510.88/30,771.12 = 8,817.60/x
  3. Step 3: Cross multiply
    20,510.88x = 30,771.12 × 8,817.60
  4. Step 4: Simplify right side
    20,510.88x = 271,327,427.71
  5. Step 5: Solve for x
    x = 271,327,427.71/20,510.88
  6. Step 6: Final answer
    x = 13,228.46

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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.