Home / 20,838.02-31,229.08-13,438.67

Finding the Fourth Proportional to 20,838.02, 31,229.08 and 13,438.67

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Solution

The fourth proportional to 20,838.02, 31,229.08 and 13,438.67 is: 20,139.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.02 : 31,229.08 = 13,438.67 : x
  2. Step 2: Convert to fraction form
    20,838.02/31,229.08 = 13,438.67/x
  3. Step 3: Cross multiply
    20,838.02x = 31,229.08 × 13,438.67
  4. Step 4: Simplify right side
    20,838.02x = 419,677,345.00
  5. Step 5: Solve for x
    x = 419,677,345.00/20,838.02
  6. Step 6: Final answer
    x = 20,139.98

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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.