Home / 28,190.50-38,885.79-18,630.47

Finding the Fourth Proportional to 28,190.50, 38,885.79 and 18,630.47

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Solution

The fourth proportional to 28,190.50, 38,885.79 and 18,630.47 is: 25,698.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,190.50 : 38,885.79 = 18,630.47 : x
  2. Step 2: Convert to fraction form
    28,190.50/38,885.79 = 18,630.47/x
  3. Step 3: Cross multiply
    28,190.50x = 38,885.79 × 18,630.47
  4. Step 4: Simplify right side
    28,190.50x = 724,460,544.02
  5. Step 5: Solve for x
    x = 724,460,544.02/28,190.50
  6. Step 6: Final answer
    x = 25,698.75

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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.