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Finding the Fourth Proportional to 30,853.90, 43,312.10 and 30,853.90

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Solution

The fourth proportional to 30,853.90, 43,312.10 and 30,853.90 is: 43,312.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,853.90 : 43,312.10 = 30,853.90 : x
  2. Step 2: Convert to fraction form
    30,853.90/43,312.10 = 30,853.90/x
  3. Step 3: Cross multiply
    30,853.90x = 43,312.10 × 30,853.90
  4. Step 4: Simplify right side
    30,853.90x = 1,336,347,202.19
  5. Step 5: Solve for x
    x = 1,336,347,202.19/30,853.90
  6. Step 6: Final answer
    x = 43,312.10

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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.