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Finding the Fourth Proportional to 18,656.61, 25,751.55 and 14,905.89

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Solution

The fourth proportional to 18,656.61, 25,751.55 and 14,905.89 is: 20,574.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,656.61 : 25,751.55 = 14,905.89 : x
  2. Step 2: Convert to fraction form
    18,656.61/25,751.55 = 14,905.89/x
  3. Step 3: Cross multiply
    18,656.61x = 25,751.55 × 14,905.89
  4. Step 4: Simplify right side
    18,656.61x = 383,849,771.63
  5. Step 5: Solve for x
    x = 383,849,771.63/18,656.61
  6. Step 6: Final answer
    x = 20,574.47

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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.