Home / 21,023.18-31,499.08-12,685.67

Finding the Fourth Proportional to 21,023.18, 31,499.08 and 12,685.67

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Solution

The fourth proportional to 21,023.18, 31,499.08 and 12,685.67 is: 19,006.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,023.18 : 31,499.08 = 12,685.67 : x
  2. Step 2: Convert to fraction form
    21,023.18/31,499.08 = 12,685.67/x
  3. Step 3: Cross multiply
    21,023.18x = 31,499.08 × 12,685.67
  4. Step 4: Simplify right side
    21,023.18x = 399,586,949.50
  5. Step 5: Solve for x
    x = 399,586,949.50/21,023.18
  6. Step 6: Final answer
    x = 19,006.97

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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.