Home / 14,405.12-19,879.28-8,440.32

Finding the Fourth Proportional to 14,405.12, 19,879.28 and 8,440.32

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Solution

The fourth proportional to 14,405.12, 19,879.28 and 8,440.32 is: 11,647.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,405.12 : 19,879.28 = 8,440.32 : x
  2. Step 2: Convert to fraction form
    14,405.12/19,879.28 = 8,440.32/x
  3. Step 3: Cross multiply
    14,405.12x = 19,879.28 × 8,440.32
  4. Step 4: Simplify right side
    14,405.12x = 167,787,484.57
  5. Step 5: Solve for x
    x = 167,787,484.57/14,405.12
  6. Step 6: Final answer
    x = 11,647.77

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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.