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Finding the Fourth Proportional to 17,190.40, 25,756.80 and 8,406.40

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Solution

The fourth proportional to 17,190.40, 25,756.80 and 8,406.40 is: 12,595.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,190.40 : 25,756.80 = 8,406.40 : x
  2. Step 2: Convert to fraction form
    17,190.40/25,756.80 = 8,406.40/x
  3. Step 3: Cross multiply
    17,190.40x = 25,756.80 × 8,406.40
  4. Step 4: Simplify right side
    17,190.40x = 216,521,963.52
  5. Step 5: Solve for x
    x = 216,521,963.52/17,190.40
  6. Step 6: Final answer
    x = 12,595.52

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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.