Home / 12,287.02-18,430.55-8,389.30

Finding the Fourth Proportional to 12,287.02, 18,430.55 and 8,389.30

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Solution

The fourth proportional to 12,287.02, 18,430.55 and 8,389.30 is: 12,583.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,287.02 : 18,430.55 = 8,389.30 : x
  2. Step 2: Convert to fraction form
    12,287.02/18,430.55 = 8,389.30/x
  3. Step 3: Cross multiply
    12,287.02x = 18,430.55 × 8,389.30
  4. Step 4: Simplify right side
    12,287.02x = 154,619,413.12
  5. Step 5: Solve for x
    x = 154,619,413.12/12,287.02
  6. Step 6: Final answer
    x = 12,583.96

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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.