Home / 13,143.10-19,717.80-4,378.09

Finding the Fourth Proportional to 13,143.10, 19,717.80 and 4,378.09

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Solution

The fourth proportional to 13,143.10, 19,717.80 and 4,378.09 is: 6,568.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.10 : 19,717.80 = 4,378.09 : x
  2. Step 2: Convert to fraction form
    13,143.10/19,717.80 = 4,378.09/x
  3. Step 3: Cross multiply
    13,143.10x = 19,717.80 × 4,378.09
  4. Step 4: Simplify right side
    13,143.10x = 86,326,303.00
  5. Step 5: Solve for x
    x = 86,326,303.00/13,143.10
  6. Step 6: Final answer
    x = 6,568.18

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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.