Home / 9,990.86-13,792.40-6,215.26

Finding the Fourth Proportional to 9,990.86, 13,792.40 and 6,215.26

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Solution

The fourth proportional to 9,990.86, 13,792.40 and 6,215.26 is: 8,580.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.86 : 13,792.40 = 6,215.26 : x
  2. Step 2: Convert to fraction form
    9,990.86/13,792.40 = 6,215.26/x
  3. Step 3: Cross multiply
    9,990.86x = 13,792.40 × 6,215.26
  4. Step 4: Simplify right side
    9,990.86x = 85,723,352.02
  5. Step 5: Solve for x
    x = 85,723,352.02/9,990.86
  6. Step 6: Final answer
    x = 8,580.18

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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.