Home / 15,494.22-21,381.98-8,420.67

Finding the Fourth Proportional to 15,494.22, 21,381.98 and 8,420.67

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Solution

The fourth proportional to 15,494.22, 21,381.98 and 8,420.67 is: 11,620.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,494.22 : 21,381.98 = 8,420.67 : x
  2. Step 2: Convert to fraction form
    15,494.22/21,381.98 = 8,420.67/x
  3. Step 3: Cross multiply
    15,494.22x = 21,381.98 × 8,420.67
  4. Step 4: Simplify right side
    15,494.22x = 180,050,555.42
  5. Step 5: Solve for x
    x = 180,050,555.42/15,494.22
  6. Step 6: Final answer
    x = 11,620.50

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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.