Home / 30,605.08-42,219.27-20,413.66

Finding the Fourth Proportional to 30,605.08, 42,219.27 and 20,413.66

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Solution

The fourth proportional to 30,605.08, 42,219.27 and 20,413.66 is: 28,160.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,605.08 : 42,219.27 = 20,413.66 : x
  2. Step 2: Convert to fraction form
    30,605.08/42,219.27 = 20,413.66/x
  3. Step 3: Cross multiply
    30,605.08x = 42,219.27 × 20,413.66
  4. Step 4: Simplify right side
    30,605.08x = 861,849,823.23
  5. Step 5: Solve for x
    x = 861,849,823.23/30,605.08
  6. Step 6: Final answer
    x = 28,160.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.