Home / 15,493.08-21,379.98-8,419.51

Finding the Fourth Proportional to 15,493.08, 21,379.98 and 8,419.51

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Solution

The fourth proportional to 15,493.08, 21,379.98 and 8,419.51 is: 11,618.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,493.08 : 21,379.98 = 8,419.51 : x
  2. Step 2: Convert to fraction form
    15,493.08/21,379.98 = 8,419.51/x
  3. Step 3: Cross multiply
    15,493.08x = 21,379.98 × 8,419.51
  4. Step 4: Simplify right side
    15,493.08x = 180,008,955.41
  5. Step 5: Solve for x
    x = 180,008,955.41/15,493.08
  6. Step 6: Final answer
    x = 11,618.67

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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.