Home / 13,556.40-18,701.52-8,777.88

Finding the Fourth Proportional to 13,556.40, 18,701.52 and 8,777.88

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Solution

The fourth proportional to 13,556.40, 18,701.52 and 8,777.88 is: 12,109.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,556.40 : 18,701.52 = 8,777.88 : x
  2. Step 2: Convert to fraction form
    13,556.40/18,701.52 = 8,777.88/x
  3. Step 3: Cross multiply
    13,556.40x = 18,701.52 × 8,777.88
  4. Step 4: Simplify right side
    13,556.40x = 164,159,698.38
  5. Step 5: Solve for x
    x = 164,159,698.38/13,556.40
  6. Step 6: Final answer
    x = 12,109.39

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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.