Home / 30,438.16-41,926.53-21,469.90

Finding the Fourth Proportional to 30,438.16, 41,926.53 and 21,469.90

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Solution

The fourth proportional to 30,438.16, 41,926.53 and 21,469.90 is: 29,573.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,438.16 : 41,926.53 = 21,469.90 : x
  2. Step 2: Convert to fraction form
    30,438.16/41,926.53 = 21,469.90/x
  3. Step 3: Cross multiply
    30,438.16x = 41,926.53 × 21,469.90
  4. Step 4: Simplify right side
    30,438.16x = 900,158,406.45
  5. Step 5: Solve for x
    x = 900,158,406.45/30,438.16
  6. Step 6: Final answer
    x = 29,573.35

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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.