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Finding the Fourth Proportional to 19,314.45, 28,965.53 and 9,953.28

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Solution

The fourth proportional to 19,314.45, 28,965.53 and 9,953.28 is: 14,926.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,314.45 : 28,965.53 = 9,953.28 : x
  2. Step 2: Convert to fraction form
    19,314.45/28,965.53 = 9,953.28/x
  3. Step 3: Cross multiply
    19,314.45x = 28,965.53 × 9,953.28
  4. Step 4: Simplify right side
    19,314.45x = 288,302,055.32
  5. Step 5: Solve for x
    x = 288,302,055.32/19,314.45
  6. Step 6: Final answer
    x = 14,926.75

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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.