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Finding the Fourth Proportional to 30,831.40, 46,172.55 and 17,643.79

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Solution

The fourth proportional to 30,831.40, 46,172.55 and 17,643.79 is: 26,423.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,831.40 : 46,172.55 = 17,643.79 : x
  2. Step 2: Convert to fraction form
    30,831.40/46,172.55 = 17,643.79/x
  3. Step 3: Cross multiply
    30,831.40x = 46,172.55 × 17,643.79
  4. Step 4: Simplify right side
    30,831.40x = 814,658,775.96
  5. Step 5: Solve for x
    x = 814,658,775.96/30,831.40
  6. Step 6: Final answer
    x = 26,423.02

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.