Home / 13,330.62-18,390.15-7,740.54

Finding the Fourth Proportional to 13,330.62, 18,390.15 and 7,740.54

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Solution

The fourth proportional to 13,330.62, 18,390.15 and 7,740.54 is: 10,678.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,330.62 : 18,390.15 = 7,740.54 : x
  2. Step 2: Convert to fraction form
    13,330.62/18,390.15 = 7,740.54/x
  3. Step 3: Cross multiply
    13,330.62x = 18,390.15 × 7,740.54
  4. Step 4: Simplify right side
    13,330.62x = 142,349,691.68
  5. Step 5: Solve for x
    x = 142,349,691.68/13,330.62
  6. Step 6: Final answer
    x = 10,678.40

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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.