Home / 25,748.80-38,619.60-8,220.40

Finding the Fourth Proportional to 25,748.80, 38,619.60 and 8,220.40

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Solution

The fourth proportional to 25,748.80, 38,619.60 and 8,220.40 is: 12,329.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,748.80 : 38,619.60 = 8,220.40 : x
  2. Step 2: Convert to fraction form
    25,748.80/38,619.60 = 8,220.40/x
  3. Step 3: Cross multiply
    25,748.80x = 38,619.60 × 8,220.40
  4. Step 4: Simplify right side
    25,748.80x = 317,468,559.84
  5. Step 5: Solve for x
    x = 317,468,559.84/25,748.80
  6. Step 6: Final answer
    x = 12,329.45

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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.