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Finding the Fourth Proportional to 11,155, 15,393.78 and 6,119.35

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Solution

The fourth proportional to 11,155, 15,393.78 and 6,119.35 is: 8,444.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,155 : 15,393.78 = 6,119.35 : x
  2. Step 2: Convert to fraction form
    11,155/15,393.78 = 6,119.35/x
  3. Step 3: Cross multiply
    11,155x = 15,393.78 × 6,119.35
  4. Step 4: Simplify right side
    11,155x = 94,199,927.64
  5. Step 5: Solve for x
    x = 94,199,927.64/11,155
  6. Step 6: Final answer
    x = 8,444.64

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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.