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Finding the Fourth Proportional to 26,148.40, 39,220.80 and 8,378.80

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Solution

The fourth proportional to 26,148.40, 39,220.80 and 8,378.80 is: 12,567.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,148.40 : 39,220.80 = 8,378.80 : x
  2. Step 2: Convert to fraction form
    26,148.40/39,220.80 = 8,378.80/x
  3. Step 3: Cross multiply
    26,148.40x = 39,220.80 × 8,378.80
  4. Step 4: Simplify right side
    26,148.40x = 328,623,239.04
  5. Step 5: Solve for x
    x = 328,623,239.04/26,148.40
  6. Step 6: Final answer
    x = 12,567.62

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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.