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Finding the Fourth Proportional to 20,700.45, 28,564.25 and 11,746.17

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Solution

The fourth proportional to 20,700.45, 28,564.25 and 11,746.17 is: 16,208.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,700.45 : 28,564.25 = 11,746.17 : x
  2. Step 2: Convert to fraction form
    20,700.45/28,564.25 = 11,746.17/x
  3. Step 3: Cross multiply
    20,700.45x = 28,564.25 × 11,746.17
  4. Step 4: Simplify right side
    20,700.45x = 335,520,477.69
  5. Step 5: Solve for x
    x = 335,520,477.69/20,700.45
  6. Step 6: Final answer
    x = 16,208.37

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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.