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Finding the Fourth Proportional to 14,628.76, 20,187.70 and 7,914.36

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Solution

The fourth proportional to 14,628.76, 20,187.70 and 7,914.36 is: 10,921.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,628.76 : 20,187.70 = 7,914.36 : x
  2. Step 2: Convert to fraction form
    14,628.76/20,187.70 = 7,914.36/x
  3. Step 3: Cross multiply
    14,628.76x = 20,187.70 × 7,914.36
  4. Step 4: Simplify right side
    14,628.76x = 159,772,725.37
  5. Step 5: Solve for x
    x = 159,772,725.37/14,628.76
  6. Step 6: Final answer
    x = 10,921.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.