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Finding the Fourth Proportional to 8,989.74, 12,405.33 and 4,955.76

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Solution

The fourth proportional to 8,989.74, 12,405.33 and 4,955.76 is: 6,838.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.74 : 12,405.33 = 4,955.76 : x
  2. Step 2: Convert to fraction form
    8,989.74/12,405.33 = 4,955.76/x
  3. Step 3: Cross multiply
    8,989.74x = 12,405.33 × 4,955.76
  4. Step 4: Simplify right side
    8,989.74x = 61,477,838.20
  5. Step 5: Solve for x
    x = 61,477,838.20/8,989.74
  6. Step 6: Final answer
    x = 6,838.67

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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.