Home / 21,177.81-31,777.56-9,339.84

Finding the Fourth Proportional to 21,177.81, 31,777.56 and 9,339.84

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Solution

The fourth proportional to 21,177.81, 31,777.56 and 9,339.84 is: 14,014.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.81 : 31,777.56 = 9,339.84 : x
  2. Step 2: Convert to fraction form
    21,177.81/31,777.56 = 9,339.84/x
  3. Step 3: Cross multiply
    21,177.81x = 31,777.56 × 9,339.84
  4. Step 4: Simplify right side
    21,177.81x = 296,797,325.99
  5. Step 5: Solve for x
    x = 296,797,325.99/21,177.81
  6. Step 6: Final answer
    x = 14,014.54

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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.