Home / 13,931.76-20,900.74-6,915.60

Finding the Fourth Proportional to 13,931.76, 20,900.74 and 6,915.60

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Solution

The fourth proportional to 13,931.76, 20,900.74 and 6,915.60 is: 10,374.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,931.76 : 20,900.74 = 6,915.60 : x
  2. Step 2: Convert to fraction form
    13,931.76/20,900.74 = 6,915.60/x
  3. Step 3: Cross multiply
    13,931.76x = 20,900.74 × 6,915.60
  4. Step 4: Simplify right side
    13,931.76x = 144,541,157.54
  5. Step 5: Solve for x
    x = 144,541,157.54/13,931.76
  6. Step 6: Final answer
    x = 10,374.94

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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.