Home / 13,931.32-20,902.31-8,388.63

Finding the Fourth Proportional to 13,931.32, 20,902.31 and 8,388.63

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Solution

The fourth proportional to 13,931.32, 20,902.31 and 8,388.63 is: 12,586.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,931.32 : 20,902.31 = 8,388.63 : x
  2. Step 2: Convert to fraction form
    13,931.32/20,902.31 = 8,388.63/x
  3. Step 3: Cross multiply
    13,931.32x = 20,902.31 × 8,388.63
  4. Step 4: Simplify right side
    13,931.32x = 175,341,661.20
  5. Step 5: Solve for x
    x = 175,341,661.20/13,931.32
  6. Step 6: Final answer
    x = 12,586.15

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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.