Home / 18,986.40-28,477.10-4,947.45

Finding the Fourth Proportional to 18,986.40, 28,477.10 and 4,947.45

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Solution

The fourth proportional to 18,986.40, 28,477.10 and 4,947.45 is: 7,420.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,986.40 : 28,477.10 = 4,947.45 : x
  2. Step 2: Convert to fraction form
    18,986.40/28,477.10 = 4,947.45/x
  3. Step 3: Cross multiply
    18,986.40x = 28,477.10 × 4,947.45
  4. Step 4: Simplify right side
    18,986.40x = 140,888,933.97
  5. Step 5: Solve for x
    x = 140,888,933.97/18,986.40
  6. Step 6: Final answer
    x = 7,420.52

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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.