Home / 15,117.56-20,861.78-8,402.84

Finding the Fourth Proportional to 15,117.56, 20,861.78 and 8,402.84

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Solution

The fourth proportional to 15,117.56, 20,861.78 and 8,402.84 is: 11,595.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,117.56 : 20,861.78 = 8,402.84 : x
  2. Step 2: Convert to fraction form
    15,117.56/20,861.78 = 8,402.84/x
  3. Step 3: Cross multiply
    15,117.56x = 20,861.78 × 8,402.84
  4. Step 4: Simplify right side
    15,117.56x = 175,298,199.46
  5. Step 5: Solve for x
    x = 175,298,199.46/15,117.56
  6. Step 6: Final answer
    x = 11,595.67

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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.