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Finding the Fourth Proportional to 30,445.76, 42,019.11 and 17,019.81

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Solution

The fourth proportional to 30,445.76, 42,019.11 and 17,019.81 is: 23,489.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,445.76 : 42,019.11 = 17,019.81 : x
  2. Step 2: Convert to fraction form
    30,445.76/42,019.11 = 17,019.81/x
  3. Step 3: Cross multiply
    30,445.76x = 42,019.11 × 17,019.81
  4. Step 4: Simplify right side
    30,445.76x = 715,157,268.57
  5. Step 5: Solve for x
    x = 715,157,268.57/30,445.76
  6. Step 6: Final answer
    x = 23,489.55

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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.