Home / 21,228.38-31,879.54-19,559.40

Finding the Fourth Proportional to 21,228.38, 31,879.54 and 19,559.40

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Solution

The fourth proportional to 21,228.38, 31,879.54 and 19,559.40 is: 29,373.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.38 : 31,879.54 = 19,559.40 : x
  2. Step 2: Convert to fraction form
    21,228.38/31,879.54 = 19,559.40/x
  3. Step 3: Cross multiply
    21,228.38x = 31,879.54 × 19,559.40
  4. Step 4: Simplify right side
    21,228.38x = 623,544,674.68
  5. Step 5: Solve for x
    x = 623,544,674.68/21,228.38
  6. Step 6: Final answer
    x = 29,373.16

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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.