Home / 11,119.60-15,342.78-6,405.40

Finding the Fourth Proportional to 11,119.60, 15,342.78 and 6,405.40

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Solution

The fourth proportional to 11,119.60, 15,342.78 and 6,405.40 is: 8,838.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,119.60 : 15,342.78 = 6,405.40 : x
  2. Step 2: Convert to fraction form
    11,119.60/15,342.78 = 6,405.40/x
  3. Step 3: Cross multiply
    11,119.60x = 15,342.78 × 6,405.40
  4. Step 4: Simplify right side
    11,119.60x = 98,276,643.01
  5. Step 5: Solve for x
    x = 98,276,643.01/11,119.60
  6. Step 6: Final answer
    x = 8,838.15

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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.