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Finding the Fourth Proportional to 30,630.90, 42,270.81 and 17,019.03

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Solution

The fourth proportional to 30,630.90, 42,270.81 and 17,019.03 is: 23,486.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,630.90 : 42,270.81 = 17,019.03 : x
  2. Step 2: Convert to fraction form
    30,630.90/42,270.81 = 17,019.03/x
  3. Step 3: Cross multiply
    30,630.90x = 42,270.81 × 17,019.03
  4. Step 4: Simplify right side
    30,630.90x = 719,408,183.51
  5. Step 5: Solve for x
    x = 719,408,183.51/30,630.90
  6. Step 6: Final answer
    x = 23,486.35

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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.