Home / 12,270.79-18,378.16-7,330.29

Finding the Fourth Proportional to 12,270.79, 18,378.16 and 7,330.29

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Solution

The fourth proportional to 12,270.79, 18,378.16 and 7,330.29 is: 10,978.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,270.79 : 18,378.16 = 7,330.29 : x
  2. Step 2: Convert to fraction form
    12,270.79/18,378.16 = 7,330.29/x
  3. Step 3: Cross multiply
    12,270.79x = 18,378.16 × 7,330.29
  4. Step 4: Simplify right side
    12,270.79x = 134,717,205.81
  5. Step 5: Solve for x
    x = 134,717,205.81/12,270.79
  6. Step 6: Final answer
    x = 10,978.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.