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Finding the Fourth Proportional to 11,762.40, 16,232.20 and 6,457.70

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Solution

The fourth proportional to 11,762.40, 16,232.20 and 6,457.70 is: 8,911.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,762.40 : 16,232.20 = 6,457.70 : x
  2. Step 2: Convert to fraction form
    11,762.40/16,232.20 = 6,457.70/x
  3. Step 3: Cross multiply
    11,762.40x = 16,232.20 × 6,457.70
  4. Step 4: Simplify right side
    11,762.40x = 104,822,677.94
  5. Step 5: Solve for x
    x = 104,822,677.94/11,762.40
  6. Step 6: Final answer
    x = 8,911.67

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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.