Home / 20,828.04-31,254.27-7,689.57

Finding the Fourth Proportional to 20,828.04, 31,254.27 and 7,689.57

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Solution

The fourth proportional to 20,828.04, 31,254.27 and 7,689.57 is: 11,538.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.04 : 31,254.27 = 7,689.57 : x
  2. Step 2: Convert to fraction form
    20,828.04/31,254.27 = 7,689.57/x
  3. Step 3: Cross multiply
    20,828.04x = 31,254.27 × 7,689.57
  4. Step 4: Simplify right side
    20,828.04x = 240,331,896.96
  5. Step 5: Solve for x
    x = 240,331,896.96/20,828.04
  6. Step 6: Final answer
    x = 11,538.86

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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.