Home / 13,815.74-19,068.80-8,778.98

Finding the Fourth Proportional to 13,815.74, 19,068.80 and 8,778.98

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Solution

The fourth proportional to 13,815.74, 19,068.80 and 8,778.98 is: 12,116.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,815.74 : 19,068.80 = 8,778.98 : x
  2. Step 2: Convert to fraction form
    13,815.74/19,068.80 = 8,778.98/x
  3. Step 3: Cross multiply
    13,815.74x = 19,068.80 × 8,778.98
  4. Step 4: Simplify right side
    13,815.74x = 167,404,474.59
  5. Step 5: Solve for x
    x = 167,404,474.59/13,815.74
  6. Step 6: Final answer
    x = 12,116.94

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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.