Home / 28,102.42-38,780.88-15,355.32

Finding the Fourth Proportional to 28,102.42, 38,780.88 and 15,355.32

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Solution

The fourth proportional to 28,102.42, 38,780.88 and 15,355.32 is: 21,190.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,102.42 : 38,780.88 = 15,355.32 : x
  2. Step 2: Convert to fraction form
    28,102.42/38,780.88 = 15,355.32/x
  3. Step 3: Cross multiply
    28,102.42x = 38,780.88 × 15,355.32
  4. Step 4: Simplify right side
    28,102.42x = 595,492,822.28
  5. Step 5: Solve for x
    x = 595,492,822.28/28,102.42
  6. Step 6: Final answer
    x = 21,190.09

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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.