Home / 28,772.42-39,716.73-21,279.05

Finding the Fourth Proportional to 28,772.42, 39,716.73 and 21,279.05

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Solution

The fourth proportional to 28,772.42, 39,716.73 and 21,279.05 is: 29,373.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,772.42 : 39,716.73 = 21,279.05 : x
  2. Step 2: Convert to fraction form
    28,772.42/39,716.73 = 21,279.05/x
  3. Step 3: Cross multiply
    28,772.42x = 39,716.73 × 21,279.05
  4. Step 4: Simplify right side
    28,772.42x = 845,134,457.27
  5. Step 5: Solve for x
    x = 845,134,457.27/28,772.42
  6. Step 6: Final answer
    x = 29,373.08

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1.5x scale

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.