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Finding the Fourth Proportional to 17,515.40, 26,209.10 and 12,907.40

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Solution

The fourth proportional to 17,515.40, 26,209.10 and 12,907.40 is: 19,313.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,515.40 : 26,209.10 = 12,907.40 : x
  2. Step 2: Convert to fraction form
    17,515.40/26,209.10 = 12,907.40/x
  3. Step 3: Cross multiply
    17,515.40x = 26,209.10 × 12,907.40
  4. Step 4: Simplify right side
    17,515.40x = 338,291,337.34
  5. Step 5: Solve for x
    x = 338,291,337.34/17,515.40
  6. Step 6: Final answer
    x = 19,313.94

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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.