Home / 21,120.11-31,688.98-9,267.76

Finding the Fourth Proportional to 21,120.11, 31,688.98 and 9,267.76

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Solution

The fourth proportional to 21,120.11, 31,688.98 and 9,267.76 is: 13,905.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120.11 : 31,688.98 = 9,267.76 : x
  2. Step 2: Convert to fraction form
    21,120.11/31,688.98 = 9,267.76/x
  3. Step 3: Cross multiply
    21,120.11x = 31,688.98 × 9,267.76
  4. Step 4: Simplify right side
    21,120.11x = 293,685,861.28
  5. Step 5: Solve for x
    x = 293,685,861.28/21,120.11
  6. Step 6: Final answer
    x = 13,905.51

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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.