Home / 20,806.30-31,206.38-7,655.61

Finding the Fourth Proportional to 20,806.30, 31,206.38 and 7,655.61

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Solution

The fourth proportional to 20,806.30, 31,206.38 and 7,655.61 is: 11,482.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.30 : 31,206.38 = 7,655.61 : x
  2. Step 2: Convert to fraction form
    20,806.30/31,206.38 = 7,655.61/x
  3. Step 3: Cross multiply
    20,806.30x = 31,206.38 × 7,655.61
  4. Step 4: Simplify right side
    20,806.30x = 238,903,836.51
  5. Step 5: Solve for x
    x = 238,903,836.51/20,806.30
  6. Step 6: Final answer
    x = 11,482.28

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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.