Home / 20,413.12-30,624.81-9,888.18

Finding the Fourth Proportional to 20,413.12, 30,624.81 and 9,888.18

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Solution

The fourth proportional to 20,413.12, 30,624.81 and 9,888.18 is: 14,834.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,413.12 : 30,624.81 = 9,888.18 : x
  2. Step 2: Convert to fraction form
    20,413.12/30,624.81 = 9,888.18/x
  3. Step 3: Cross multiply
    20,413.12x = 30,624.81 × 9,888.18
  4. Step 4: Simplify right side
    20,413.12x = 302,823,633.75
  5. Step 5: Solve for x
    x = 302,823,633.75/20,413.12
  6. Step 6: Final answer
    x = 14,834.75

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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.