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Finding the Fourth Proportional to 18,291.84, 25,219.80 and 14,931.24

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Solution

The fourth proportional to 18,291.84, 25,219.80 and 14,931.24 is: 20,586.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,291.84 : 25,219.80 = 14,931.24 : x
  2. Step 2: Convert to fraction form
    18,291.84/25,219.80 = 14,931.24/x
  3. Step 3: Cross multiply
    18,291.84x = 25,219.80 × 14,931.24
  4. Step 4: Simplify right side
    18,291.84x = 376,562,886.55
  5. Step 5: Solve for x
    x = 376,562,886.55/18,291.84
  6. Step 6: Final answer
    x = 20,586.39

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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.