Home / 21,866.58-30,165.54-12,908.10

Finding the Fourth Proportional to 21,866.58, 30,165.54 and 12,908.10

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Solution

The fourth proportional to 21,866.58, 30,165.54 and 12,908.10 is: 17,807.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,866.58 : 30,165.54 = 12,908.10 : x
  2. Step 2: Convert to fraction form
    21,866.58/30,165.54 = 12,908.10/x
  3. Step 3: Cross multiply
    21,866.58x = 30,165.54 × 12,908.10
  4. Step 4: Simplify right side
    21,866.58x = 389,379,806.87
  5. Step 5: Solve for x
    x = 389,379,806.87/21,866.58
  6. Step 6: Final answer
    x = 17,807.07

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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.