Home / 28,138.80-42,208.20-7,362.30

Finding the Fourth Proportional to 28,138.80, 42,208.20 and 7,362.30

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Solution

The fourth proportional to 28,138.80, 42,208.20 and 7,362.30 is: 11,043.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,138.80 : 42,208.20 = 7,362.30 : x
  2. Step 2: Convert to fraction form
    28,138.80/42,208.20 = 7,362.30/x
  3. Step 3: Cross multiply
    28,138.80x = 42,208.20 × 7,362.30
  4. Step 4: Simplify right side
    28,138.80x = 310,749,430.86
  5. Step 5: Solve for x
    x = 310,749,430.86/28,138.80
  6. Step 6: Final answer
    x = 11,043.45

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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.