Home / 28,155.54-42,203.89-9,420.17

Finding the Fourth Proportional to 28,155.54, 42,203.89 and 9,420.17

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Solution

The fourth proportional to 28,155.54, 42,203.89 and 9,420.17 is: 14,120.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,155.54 : 42,203.89 = 9,420.17 : x
  2. Step 2: Convert to fraction form
    28,155.54/42,203.89 = 9,420.17/x
  3. Step 3: Cross multiply
    28,155.54x = 42,203.89 × 9,420.17
  4. Step 4: Simplify right side
    28,155.54x = 397,567,583.89
  5. Step 5: Solve for x
    x = 397,567,583.89/28,155.54
  6. Step 6: Final answer
    x = 14,120.40

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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.