Home / 13,130.60-18,119.78-7,825.32

Finding the Fourth Proportional to 13,130.60, 18,119.78 and 7,825.32

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Solution

The fourth proportional to 13,130.60, 18,119.78 and 7,825.32 is: 10,798.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.60 : 18,119.78 = 7,825.32 : x
  2. Step 2: Convert to fraction form
    13,130.60/18,119.78 = 7,825.32/x
  3. Step 3: Cross multiply
    13,130.60x = 18,119.78 × 7,825.32
  4. Step 4: Simplify right side
    13,130.60x = 141,793,076.83
  5. Step 5: Solve for x
    x = 141,793,076.83/13,130.60
  6. Step 6: Final answer
    x = 10,798.67

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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.