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Finding the Fourth Proportional to 14,804.57, 20,420.75 and 8,831.63

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Solution

The fourth proportional to 14,804.57, 20,420.75 and 8,831.63 is: 12,181.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,804.57 : 20,420.75 = 8,831.63 : x
  2. Step 2: Convert to fraction form
    14,804.57/20,420.75 = 8,831.63/x
  3. Step 3: Cross multiply
    14,804.57x = 20,420.75 × 8,831.63
  4. Step 4: Simplify right side
    14,804.57x = 180,348,508.32
  5. Step 5: Solve for x
    x = 180,348,508.32/14,804.57
  6. Step 6: Final answer
    x = 12,181.95

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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.