Home / 12,886.18-19,316.95-8,191.67

Finding the Fourth Proportional to 12,886.18, 19,316.95 and 8,191.67

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Solution

The fourth proportional to 12,886.18, 19,316.95 and 8,191.67 is: 12,279.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,886.18 : 19,316.95 = 8,191.67 : x
  2. Step 2: Convert to fraction form
    12,886.18/19,316.95 = 8,191.67/x
  3. Step 3: Cross multiply
    12,886.18x = 19,316.95 × 8,191.67
  4. Step 4: Simplify right side
    12,886.18x = 158,237,962.74
  5. Step 5: Solve for x
    x = 158,237,962.74/12,886.18
  6. Step 6: Final answer
    x = 12,279.67

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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.