Home / 53,789.45-80,720.93-18,729.11

Finding the Fourth Proportional to 53,789.45, 80,720.93 and 18,729.11

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Solution

The fourth proportional to 53,789.45, 80,720.93 and 18,729.11 is: 28,106.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,789.45 : 80,720.93 = 18,729.11 : x
  2. Step 2: Convert to fraction form
    53,789.45/80,720.93 = 18,729.11/x
  3. Step 3: Cross multiply
    53,789.45x = 80,720.93 × 18,729.11
  4. Step 4: Simplify right side
    53,789.45x = 1,511,830,680.02
  5. Step 5: Solve for x
    x = 1,511,830,680.02/53,789.45
  6. Step 6: Final answer
    x = 28,106.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.