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Finding the Fourth Proportional to 18,811.80, 25,955.03 and 14,820.52

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Solution

The fourth proportional to 18,811.80, 25,955.03 and 14,820.52 is: 20,448.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,811.80 : 25,955.03 = 14,820.52 : x
  2. Step 2: Convert to fraction form
    18,811.80/25,955.03 = 14,820.52/x
  3. Step 3: Cross multiply
    18,811.80x = 25,955.03 × 14,820.52
  4. Step 4: Simplify right side
    18,811.80x = 384,666,967.11
  5. Step 5: Solve for x
    x = 384,666,967.11/18,811.80
  6. Step 6: Final answer
    x = 20,448.18

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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.