Home / 11,185.95-15,430.15-6,986.91

Finding the Fourth Proportional to 11,185.95, 15,430.15 and 6,986.91

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Solution

The fourth proportional to 11,185.95, 15,430.15 and 6,986.91 is: 9,637.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,185.95 : 15,430.15 = 6,986.91 : x
  2. Step 2: Convert to fraction form
    11,185.95/15,430.15 = 6,986.91/x
  3. Step 3: Cross multiply
    11,185.95x = 15,430.15 × 6,986.91
  4. Step 4: Simplify right side
    11,185.95x = 107,809,009.84
  5. Step 5: Solve for x
    x = 107,809,009.84/11,185.95
  6. Step 6: Final answer
    x = 9,637.90

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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.