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Finding the Fourth Proportional to 30,821.40, 43,266.60 and 30,821.40

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Solution

The fourth proportional to 30,821.40, 43,266.60 and 30,821.40 is: 43,266.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,821.40 : 43,266.60 = 30,821.40 : x
  2. Step 2: Convert to fraction form
    30,821.40/43,266.60 = 30,821.40/x
  3. Step 3: Cross multiply
    30,821.40x = 43,266.60 × 30,821.40
  4. Step 4: Simplify right side
    30,821.40x = 1,333,537,185.24
  5. Step 5: Solve for x
    x = 1,333,537,185.24/30,821.40
  6. Step 6: Final answer
    x = 43,266.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.