Home / 20,838.51-31,257.77-9,151.83

Finding the Fourth Proportional to 20,838.51, 31,257.77 and 9,151.83

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Solution

The fourth proportional to 20,838.51, 31,257.77 and 9,151.83 is: 13,727.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.51 : 31,257.77 = 9,151.83 : x
  2. Step 2: Convert to fraction form
    20,838.51/31,257.77 = 9,151.83/x
  3. Step 3: Cross multiply
    20,838.51x = 31,257.77 × 9,151.83
  4. Step 4: Simplify right side
    20,838.51x = 286,065,618.05
  5. Step 5: Solve for x
    x = 286,065,618.05/20,838.51
  6. Step 6: Final answer
    x = 13,727.74

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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.