Home / 13,140.80-19,678.80-8,734.40

Finding the Fourth Proportional to 13,140.80, 19,678.80 and 8,734.40

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Solution

The fourth proportional to 13,140.80, 19,678.80 and 8,734.40 is: 13,080.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.80 : 19,678.80 = 8,734.40 : x
  2. Step 2: Convert to fraction form
    13,140.80/19,678.80 = 8,734.40/x
  3. Step 3: Cross multiply
    13,140.80x = 19,678.80 × 8,734.40
  4. Step 4: Simplify right side
    13,140.80x = 171,882,510.72
  5. Step 5: Solve for x
    x = 171,882,510.72/13,140.80
  6. Step 6: Final answer
    x = 13,080.06

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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.