Home / 20,806.55-31,206.75-7,655.86

Finding the Fourth Proportional to 20,806.55, 31,206.75 and 7,655.86

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Solution

The fourth proportional to 20,806.55, 31,206.75 and 7,655.86 is: 11,482.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.55 : 31,206.75 = 7,655.86 : x
  2. Step 2: Convert to fraction form
    20,806.55/31,206.75 = 7,655.86/x
  3. Step 3: Cross multiply
    20,806.55x = 31,206.75 × 7,655.86
  4. Step 4: Simplify right side
    20,806.55x = 238,914,509.06
  5. Step 5: Solve for x
    x = 238,914,509.06/20,806.55
  6. Step 6: Final answer
    x = 11,482.66

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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.