Home / 13,133.28-18,124.20-7,165.08

Finding the Fourth Proportional to 13,133.28, 18,124.20 and 7,165.08

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Solution

The fourth proportional to 13,133.28, 18,124.20 and 7,165.08 is: 9,887.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,133.28 : 18,124.20 = 7,165.08 : x
  2. Step 2: Convert to fraction form
    13,133.28/18,124.20 = 7,165.08/x
  3. Step 3: Cross multiply
    13,133.28x = 18,124.20 × 7,165.08
  4. Step 4: Simplify right side
    13,133.28x = 129,861,342.94
  5. Step 5: Solve for x
    x = 129,861,342.94/13,133.28
  6. Step 6: Final answer
    x = 9,887.96

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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.