Home / 13,140-18,133.20-8,955.56

Finding the Fourth Proportional to 13,140, 18,133.20 and 8,955.56

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Solution

The fourth proportional to 13,140, 18,133.20 and 8,955.56 is: 12,358.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140 : 18,133.20 = 8,955.56 : x
  2. Step 2: Convert to fraction form
    13,140/18,133.20 = 8,955.56/x
  3. Step 3: Cross multiply
    13,140x = 18,133.20 × 8,955.56
  4. Step 4: Simplify right side
    13,140x = 162,392,960.59
  5. Step 5: Solve for x
    x = 162,392,960.59/13,140
  6. Step 6: Final answer
    x = 12,358.67

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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.