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Finding the Fourth Proportional to 18,705.71, 28,069.76 and 7,459.07

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Solution

The fourth proportional to 18,705.71, 28,069.76 and 7,459.07 is: 11,193.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,705.71 : 28,069.76 = 7,459.07 : x
  2. Step 2: Convert to fraction form
    18,705.71/28,069.76 = 7,459.07/x
  3. Step 3: Cross multiply
    18,705.71x = 28,069.76 × 7,459.07
  4. Step 4: Simplify right side
    18,705.71x = 209,374,183.02
  5. Step 5: Solve for x
    x = 209,374,183.02/18,705.71
  6. Step 6: Final answer
    x = 11,193.06

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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.