Home / 20,678.47-28,524.49-12,715.05

Finding the Fourth Proportional to 20,678.47, 28,524.49 and 12,715.05

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Solution

The fourth proportional to 20,678.47, 28,524.49 and 12,715.05 is: 17,539.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.47 : 28,524.49 = 12,715.05 : x
  2. Step 2: Convert to fraction form
    20,678.47/28,524.49 = 12,715.05/x
  3. Step 3: Cross multiply
    20,678.47x = 28,524.49 × 12,715.05
  4. Step 4: Simplify right side
    20,678.47x = 362,690,391.75
  5. Step 5: Solve for x
    x = 362,690,391.75/20,678.47
  6. Step 6: Final answer
    x = 17,539.52

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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.