Home / 13,253.12-18,288.20-7,664.48

Finding the Fourth Proportional to 13,253.12, 18,288.20 and 7,664.48

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Solution

The fourth proportional to 13,253.12, 18,288.20 and 7,664.48 is: 10,576.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,253.12 : 18,288.20 = 7,664.48 : x
  2. Step 2: Convert to fraction form
    13,253.12/18,288.20 = 7,664.48/x
  3. Step 3: Cross multiply
    13,253.12x = 18,288.20 × 7,664.48
  4. Step 4: Simplify right side
    13,253.12x = 140,169,543.14
  5. Step 5: Solve for x
    x = 140,169,543.14/13,253.12
  6. Step 6: Final answer
    x = 10,576.34

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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.