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Finding the Fourth Proportional to 17,385.40, 26,078.10 and 13,289.40

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Solution

The fourth proportional to 17,385.40, 26,078.10 and 13,289.40 is: 19,934.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,385.40 : 26,078.10 = 13,289.40 : x
  2. Step 2: Convert to fraction form
    17,385.40/26,078.10 = 13,289.40/x
  3. Step 3: Cross multiply
    17,385.40x = 26,078.10 × 13,289.40
  4. Step 4: Simplify right side
    17,385.40x = 346,562,302.14
  5. Step 5: Solve for x
    x = 346,562,302.14/17,385.40
  6. Step 6: Final answer
    x = 19,934.10

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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.