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Finding the Fourth Proportional to 18,992.40, 28,457.40 and 6,505.62

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Solution

The fourth proportional to 18,992.40, 28,457.40 and 6,505.62 is: 9,747.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,992.40 : 28,457.40 = 6,505.62 : x
  2. Step 2: Convert to fraction form
    18,992.40/28,457.40 = 6,505.62/x
  3. Step 3: Cross multiply
    18,992.40x = 28,457.40 × 6,505.62
  4. Step 4: Simplify right side
    18,992.40x = 185,133,030.59
  5. Step 5: Solve for x
    x = 185,133,030.59/18,992.40
  6. Step 6: Final answer
    x = 9,747.74

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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.