Home / 21,937.20-30,271.31-13,435.44

Finding the Fourth Proportional to 21,937.20, 30,271.31 and 13,435.44

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Solution

The fourth proportional to 21,937.20, 30,271.31 and 13,435.44 is: 18,539.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,937.20 : 30,271.31 = 13,435.44 : x
  2. Step 2: Convert to fraction form
    21,937.20/30,271.31 = 13,435.44/x
  3. Step 3: Cross multiply
    21,937.20x = 30,271.31 × 13,435.44
  4. Step 4: Simplify right side
    21,937.20x = 406,708,369.23
  5. Step 5: Solve for x
    x = 406,708,369.23/21,937.20
  6. Step 6: Final answer
    x = 18,539.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.