Home / 19,980.20-27,567.87-12,806.84

Finding the Fourth Proportional to 19,980.20, 27,567.87 and 12,806.84

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Solution

The fourth proportional to 19,980.20, 27,567.87 and 12,806.84 is: 17,670.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,980.20 : 27,567.87 = 12,806.84 : x
  2. Step 2: Convert to fraction form
    19,980.20/27,567.87 = 12,806.84/x
  3. Step 3: Cross multiply
    19,980.20x = 27,567.87 × 12,806.84
  4. Step 4: Simplify right side
    19,980.20x = 353,057,300.23
  5. Step 5: Solve for x
    x = 353,057,300.23/19,980.20
  6. Step 6: Final answer
    x = 17,670.36

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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.