Home / 13,930.65-20,971.98-12,705.93

Finding the Fourth Proportional to 13,930.65, 20,971.98 and 12,705.93

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Solution

The fourth proportional to 13,930.65, 20,971.98 and 12,705.93 is: 19,128.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,930.65 : 20,971.98 = 12,705.93 : x
  2. Step 2: Convert to fraction form
    13,930.65/20,971.98 = 12,705.93/x
  3. Step 3: Cross multiply
    13,930.65x = 20,971.98 × 12,705.93
  4. Step 4: Simplify right side
    13,930.65x = 266,468,509.84
  5. Step 5: Solve for x
    x = 266,468,509.84/13,930.65
  6. Step 6: Final answer
    x = 19,128.22

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.