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Finding the Fourth Proportional to 28,483.62, 42,728.84 and 11,854.89

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Solution

The fourth proportional to 28,483.62, 42,728.84 and 11,854.89 is: 17,783.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,483.62 : 42,728.84 = 11,854.89 : x
  2. Step 2: Convert to fraction form
    28,483.62/42,728.84 = 11,854.89/x
  3. Step 3: Cross multiply
    28,483.62x = 42,728.84 × 11,854.89
  4. Step 4: Simplify right side
    28,483.62x = 506,545,698.03
  5. Step 5: Solve for x
    x = 506,545,698.03/28,483.62
  6. Step 6: Final answer
    x = 17,783.75

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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.