Home / 13,478.28-20,192.79-9,771.32

Finding the Fourth Proportional to 13,478.28, 20,192.79 and 9,771.32

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Solution

The fourth proportional to 13,478.28, 20,192.79 and 9,771.32 is: 14,639.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,478.28 : 20,192.79 = 9,771.32 : x
  2. Step 2: Convert to fraction form
    13,478.28/20,192.79 = 9,771.32/x
  3. Step 3: Cross multiply
    13,478.28x = 20,192.79 × 9,771.32
  4. Step 4: Simplify right side
    13,478.28x = 197,310,111.82
  5. Step 5: Solve for x
    x = 197,310,111.82/13,478.28
  6. Step 6: Final answer
    x = 14,639.12

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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.