Home / 20,459.81-28,234.85-12,500.35

Finding the Fourth Proportional to 20,459.81, 28,234.85 and 12,500.35

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Solution

The fourth proportional to 20,459.81, 28,234.85 and 12,500.35 is: 17,250.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,459.81 : 28,234.85 = 12,500.35 : x
  2. Step 2: Convert to fraction form
    20,459.81/28,234.85 = 12,500.35/x
  3. Step 3: Cross multiply
    20,459.81x = 28,234.85 × 12,500.35
  4. Step 4: Simplify right side
    20,459.81x = 352,945,374.11
  5. Step 5: Solve for x
    x = 352,945,374.11/20,459.81
  6. Step 6: Final answer
    x = 17,250.67

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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.