Home / 20,870.27-28,800.66-11,309.93

Finding the Fourth Proportional to 20,870.27, 28,800.66 and 11,309.93

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Solution

The fourth proportional to 20,870.27, 28,800.66 and 11,309.93 is: 15,607.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.27 : 28,800.66 = 11,309.93 : x
  2. Step 2: Convert to fraction form
    20,870.27/28,800.66 = 11,309.93/x
  3. Step 3: Cross multiply
    20,870.27x = 28,800.66 × 11,309.93
  4. Step 4: Simplify right side
    20,870.27x = 325,733,448.55
  5. Step 5: Solve for x
    x = 325,733,448.55/20,870.27
  6. Step 6: Final answer
    x = 15,607.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.