Home / 13,218.93-19,823.78-5,319.40

Finding the Fourth Proportional to 13,218.93, 19,823.78 and 5,319.40

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Solution

The fourth proportional to 13,218.93, 19,823.78 and 5,319.40 is: 7,977.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.93 : 19,823.78 = 5,319.40 : x
  2. Step 2: Convert to fraction form
    13,218.93/19,823.78 = 5,319.40/x
  3. Step 3: Cross multiply
    13,218.93x = 19,823.78 × 5,319.40
  4. Step 4: Simplify right side
    13,218.93x = 105,450,615.33
  5. Step 5: Solve for x
    x = 105,450,615.33/13,218.93
  6. Step 6: Final answer
    x = 7,977.24

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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.