Home / 13,328.16-18,390.36-7,664.88

Finding the Fourth Proportional to 13,328.16, 18,390.36 and 7,664.88

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Solution

The fourth proportional to 13,328.16, 18,390.36 and 7,664.88 is: 10,576.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,328.16 : 18,390.36 = 7,664.88 : x
  2. Step 2: Convert to fraction form
    13,328.16/18,390.36 = 7,664.88/x
  3. Step 3: Cross multiply
    13,328.16x = 18,390.36 × 7,664.88
  4. Step 4: Simplify right side
    13,328.16x = 140,959,902.56
  5. Step 5: Solve for x
    x = 140,959,902.56/13,328.16
  6. Step 6: Final answer
    x = 10,576.10

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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.