Home / 13,478.32-18,600.60-7,812.97

Finding the Fourth Proportional to 13,478.32, 18,600.60 and 7,812.97

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Solution

The fourth proportional to 13,478.32, 18,600.60 and 7,812.97 is: 10,782.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,478.32 : 18,600.60 = 7,812.97 : x
  2. Step 2: Convert to fraction form
    13,478.32/18,600.60 = 7,812.97/x
  3. Step 3: Cross multiply
    13,478.32x = 18,600.60 × 7,812.97
  4. Step 4: Simplify right side
    13,478.32x = 145,325,929.78
  5. Step 5: Solve for x
    x = 145,325,929.78/13,478.32
  6. Step 6: Final answer
    x = 10,782.20

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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.