Home / 20,749.30-31,111.38-8,271.22

Finding the Fourth Proportional to 20,749.30, 31,111.38 and 8,271.22

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Solution

The fourth proportional to 20,749.30, 31,111.38 and 8,271.22 is: 12,401.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.30 : 31,111.38 = 8,271.22 : x
  2. Step 2: Convert to fraction form
    20,749.30/31,111.38 = 8,271.22/x
  3. Step 3: Cross multiply
    20,749.30x = 31,111.38 × 8,271.22
  4. Step 4: Simplify right side
    20,749.30x = 257,329,068.48
  5. Step 5: Solve for x
    x = 257,329,068.48/20,749.30
  6. Step 6: Final answer
    x = 12,401.82

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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.