Home / 13,815.86-19,065.37-8,447.28

Finding the Fourth Proportional to 13,815.86, 19,065.37 and 8,447.28

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Solution

The fourth proportional to 13,815.86, 19,065.37 and 8,447.28 is: 11,656.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,815.86 : 19,065.37 = 8,447.28 : x
  2. Step 2: Convert to fraction form
    13,815.86/19,065.37 = 8,447.28/x
  3. Step 3: Cross multiply
    13,815.86x = 19,065.37 × 8,447.28
  4. Step 4: Simplify right side
    13,815.86x = 161,050,518.69
  5. Step 5: Solve for x
    x = 161,050,518.69/13,815.86
  6. Step 6: Final answer
    x = 11,656.93

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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.