Home / 28,288.48-42,421.16-12,279.04

Finding the Fourth Proportional to 28,288.48, 42,421.16 and 12,279.04

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Solution

The fourth proportional to 28,288.48, 42,421.16 and 12,279.04 is: 18,413.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,288.48 : 42,421.16 = 12,279.04 : x
  2. Step 2: Convert to fraction form
    28,288.48/42,421.16 = 12,279.04/x
  3. Step 3: Cross multiply
    28,288.48x = 42,421.16 × 12,279.04
  4. Step 4: Simplify right side
    28,288.48x = 520,891,120.49
  5. Step 5: Solve for x
    x = 520,891,120.49/28,288.48
  6. Step 6: Final answer
    x = 18,413.54

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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.