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Finding the Fourth Proportional to 28,356.75, 42,536.88 and 8,636.76

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Solution

The fourth proportional to 28,356.75, 42,536.88 and 8,636.76 is: 12,955.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,356.75 : 42,536.88 = 8,636.76 : x
  2. Step 2: Convert to fraction form
    28,356.75/42,536.88 = 8,636.76/x
  3. Step 3: Cross multiply
    28,356.75x = 42,536.88 × 8,636.76
  4. Step 4: Simplify right side
    28,356.75x = 367,380,823.71
  5. Step 5: Solve for x
    x = 367,380,823.71/28,356.75
  6. Step 6: Final answer
    x = 12,955.67

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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.