Home / 28,288.84-39,037.56-15,714.40

Finding the Fourth Proportional to 28,288.84, 39,037.56 and 15,714.40

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Solution

The fourth proportional to 28,288.84, 39,037.56 and 15,714.40 is: 21,685.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,288.84 : 39,037.56 = 15,714.40 : x
  2. Step 2: Convert to fraction form
    28,288.84/39,037.56 = 15,714.40/x
  3. Step 3: Cross multiply
    28,288.84x = 39,037.56 × 15,714.40
  4. Step 4: Simplify right side
    28,288.84x = 613,451,832.86
  5. Step 5: Solve for x
    x = 613,451,832.86/28,288.84
  6. Step 6: Final answer
    x = 21,685.29

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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.