Home / 13,121.10-19,681.65-6,878.70

Finding the Fourth Proportional to 13,121.10, 19,681.65 and 6,878.70

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Solution

The fourth proportional to 13,121.10, 19,681.65 and 6,878.70 is: 10,318.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.10 : 19,681.65 = 6,878.70 : x
  2. Step 2: Convert to fraction form
    13,121.10/19,681.65 = 6,878.70/x
  3. Step 3: Cross multiply
    13,121.10x = 19,681.65 × 6,878.70
  4. Step 4: Simplify right side
    13,121.10x = 135,384,165.86
  5. Step 5: Solve for x
    x = 135,384,165.86/13,121.10
  6. Step 6: Final answer
    x = 10,318.05

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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.