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Finding the Fourth Proportional to 15,355.69, 22,990.76 and 7,842.98

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Solution

The fourth proportional to 15,355.69, 22,990.76 and 7,842.98 is: 11,742.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,355.69 : 22,990.76 = 7,842.98 : x
  2. Step 2: Convert to fraction form
    15,355.69/22,990.76 = 7,842.98/x
  3. Step 3: Cross multiply
    15,355.69x = 22,990.76 × 7,842.98
  4. Step 4: Simplify right side
    15,355.69x = 180,315,916.70
  5. Step 5: Solve for x
    x = 180,315,916.70/15,355.69
  6. Step 6: Final answer
    x = 11,742.62

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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.