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Finding the Fourth Proportional to 18,698.04, 25,750.80 and 18,289.80

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Solution

The fourth proportional to 18,698.04, 25,750.80 and 18,289.80 is: 25,188.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.04 : 25,750.80 = 18,289.80 : x
  2. Step 2: Convert to fraction form
    18,698.04/25,750.80 = 18,289.80/x
  3. Step 3: Cross multiply
    18,698.04x = 25,750.80 × 18,289.80
  4. Step 4: Simplify right side
    18,698.04x = 470,976,981.84
  5. Step 5: Solve for x
    x = 470,976,981.84/18,698.04
  6. Step 6: Final answer
    x = 25,188.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.