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Finding the Fourth Proportional to 13,657.44, 20,509.20 and 12,955.98

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Solution

The fourth proportional to 13,657.44, 20,509.20 and 12,955.98 is: 19,455.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,657.44 : 20,509.20 = 12,955.98 : x
  2. Step 2: Convert to fraction form
    13,657.44/20,509.20 = 12,955.98/x
  3. Step 3: Cross multiply
    13,657.44x = 20,509.20 × 12,955.98
  4. Step 4: Simplify right side
    13,657.44x = 265,716,785.02
  5. Step 5: Solve for x
    x = 265,716,785.02/13,657.44
  6. Step 6: Final answer
    x = 19,455.83

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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.