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Finding the Fourth Proportional to 19,352.67, 26,679.69 and 12,980.40

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Solution

The fourth proportional to 19,352.67, 26,679.69 and 12,980.40 is: 17,894.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,352.67 : 26,679.69 = 12,980.40 : x
  2. Step 2: Convert to fraction form
    19,352.67/26,679.69 = 12,980.40/x
  3. Step 3: Cross multiply
    19,352.67x = 26,679.69 × 12,980.40
  4. Step 4: Simplify right side
    19,352.67x = 346,313,048.08
  5. Step 5: Solve for x
    x = 346,313,048.08/19,352.67
  6. Step 6: Final answer
    x = 17,894.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.