Home / 20,627.84-30,931.60-7,478.24

Finding the Fourth Proportional to 20,627.84, 30,931.60 and 7,478.24

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Solution

The fourth proportional to 20,627.84, 30,931.60 and 7,478.24 is: 11,213.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,627.84 : 30,931.60 = 7,478.24 : x
  2. Step 2: Convert to fraction form
    20,627.84/30,931.60 = 7,478.24/x
  3. Step 3: Cross multiply
    20,627.84x = 30,931.60 × 7,478.24
  4. Step 4: Simplify right side
    20,627.84x = 231,313,928.38
  5. Step 5: Solve for x
    x = 231,313,928.38/20,627.84
  6. Step 6: Final answer
    x = 11,213.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.