Home / 13,780.08-19,016.64-8,190

Finding the Fourth Proportional to 13,780.08, 19,016.64 and 8,190

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Solution

The fourth proportional to 13,780.08, 19,016.64 and 8,190 is: 11,302.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.08 : 19,016.64 = 8,190 : x
  2. Step 2: Convert to fraction form
    13,780.08/19,016.64 = 8,190/x
  3. Step 3: Cross multiply
    13,780.08x = 19,016.64 × 8,190
  4. Step 4: Simplify right side
    13,780.08x = 155,746,281.60
  5. Step 5: Solve for x
    x = 155,746,281.60/13,780.08
  6. Step 6: Final answer
    x = 11,302.28

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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.