Home / 11,378.41-15,693.30-7,400.79

Finding the Fourth Proportional to 11,378.41, 15,693.30 and 7,400.79

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Solution

The fourth proportional to 11,378.41, 15,693.30 and 7,400.79 is: 10,207.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,378.41 : 15,693.30 = 7,400.79 : x
  2. Step 2: Convert to fraction form
    11,378.41/15,693.30 = 7,400.79/x
  3. Step 3: Cross multiply
    11,378.41x = 15,693.30 × 7,400.79
  4. Step 4: Simplify right side
    11,378.41x = 116,142,817.71
  5. Step 5: Solve for x
    x = 116,142,817.71/11,378.41
  6. Step 6: Final answer
    x = 10,207.30

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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.