Home / 20,653.14-28,495.24-11,700.45

Finding the Fourth Proportional to 20,653.14, 28,495.24 and 11,700.45

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Solution

The fourth proportional to 20,653.14, 28,495.24 and 11,700.45 is: 16,143.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.14 : 28,495.24 = 11,700.45 : x
  2. Step 2: Convert to fraction form
    20,653.14/28,495.24 = 11,700.45/x
  3. Step 3: Cross multiply
    20,653.14x = 28,495.24 × 11,700.45
  4. Step 4: Simplify right side
    20,653.14x = 333,407,167.42
  5. Step 5: Solve for x
    x = 333,407,167.42/20,653.14
  6. Step 6: Final answer
    x = 16,143.17

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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.