Home / 13,388.16-18,468.48-9,665.28

Finding the Fourth Proportional to 13,388.16, 18,468.48 and 9,665.28

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Solution

The fourth proportional to 13,388.16, 18,468.48 and 9,665.28 is: 13,332.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,388.16 : 18,468.48 = 9,665.28 : x
  2. Step 2: Convert to fraction form
    13,388.16/18,468.48 = 9,665.28/x
  3. Step 3: Cross multiply
    13,388.16x = 18,468.48 × 9,665.28
  4. Step 4: Simplify right side
    13,388.16x = 178,503,030.37
  5. Step 5: Solve for x
    x = 178,503,030.37/13,388.16
  6. Step 6: Final answer
    x = 13,332.90

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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.