Home / 20,778.95-31,173.75-5,989.02

Finding the Fourth Proportional to 20,778.95, 31,173.75 and 5,989.02

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Solution

The fourth proportional to 20,778.95, 31,173.75 and 5,989.02 is: 8,985.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.95 : 31,173.75 = 5,989.02 : x
  2. Step 2: Convert to fraction form
    20,778.95/31,173.75 = 5,989.02/x
  3. Step 3: Cross multiply
    20,778.95x = 31,173.75 × 5,989.02
  4. Step 4: Simplify right side
    20,778.95x = 186,700,212.23
  5. Step 5: Solve for x
    x = 186,700,212.23/20,778.95
  6. Step 6: Final answer
    x = 8,985.07

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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.