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Finding the Fourth Proportional to 12,658.80, 19,004.40 and 6,740.40

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Solution

The fourth proportional to 12,658.80, 19,004.40 and 6,740.40 is: 10,119.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,658.80 : 19,004.40 = 6,740.40 : x
  2. Step 2: Convert to fraction form
    12,658.80/19,004.40 = 6,740.40/x
  3. Step 3: Cross multiply
    12,658.80x = 19,004.40 × 6,740.40
  4. Step 4: Simplify right side
    12,658.80x = 128,097,257.76
  5. Step 5: Solve for x
    x = 128,097,257.76/12,658.80
  6. Step 6: Final answer
    x = 10,119.23

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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.