Home / 28,561.51-42,869.94-13,780.81

Finding the Fourth Proportional to 28,561.51, 42,869.94 and 13,780.81

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Solution

The fourth proportional to 28,561.51, 42,869.94 and 13,780.81 is: 20,684.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,561.51 : 42,869.94 = 13,780.81 : x
  2. Step 2: Convert to fraction form
    28,561.51/42,869.94 = 13,780.81/x
  3. Step 3: Cross multiply
    28,561.51x = 42,869.94 × 13,780.81
  4. Step 4: Simplify right side
    28,561.51x = 590,782,497.85
  5. Step 5: Solve for x
    x = 590,782,497.85/28,561.51
  6. Step 6: Final answer
    x = 20,684.57

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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.