Home / 28,102.13-38,715.08-19,588.78

Finding the Fourth Proportional to 28,102.13, 38,715.08 and 19,588.78

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Solution

The fourth proportional to 28,102.13, 38,715.08 and 19,588.78 is: 26,986.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,102.13 : 38,715.08 = 19,588.78 : x
  2. Step 2: Convert to fraction form
    28,102.13/38,715.08 = 19,588.78/x
  3. Step 3: Cross multiply
    28,102.13x = 38,715.08 × 19,588.78
  4. Step 4: Simplify right side
    28,102.13x = 758,380,893.28
  5. Step 5: Solve for x
    x = 758,380,893.28/28,102.13
  6. Step 6: Final answer
    x = 26,986.60

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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.