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Finding the Fourth Proportional to 13,903.60, 20,804.16 and 8,360.32

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Solution

The fourth proportional to 13,903.60, 20,804.16 and 8,360.32 is: 12,509.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,903.60 : 20,804.16 = 8,360.32 : x
  2. Step 2: Convert to fraction form
    13,903.60/20,804.16 = 8,360.32/x
  3. Step 3: Cross multiply
    13,903.60x = 20,804.16 × 8,360.32
  4. Step 4: Simplify right side
    13,903.60x = 173,929,434.93
  5. Step 5: Solve for x
    x = 173,929,434.93/13,903.60
  6. Step 6: Final answer
    x = 12,509.67

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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.