Home / 28,101.64-38,780.54-15,355.21

Finding the Fourth Proportional to 28,101.64, 38,780.54 and 15,355.21

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Solution

The fourth proportional to 28,101.64, 38,780.54 and 15,355.21 is: 21,190.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,101.64 : 38,780.54 = 15,355.21 : x
  2. Step 2: Convert to fraction form
    28,101.64/38,780.54 = 15,355.21/x
  3. Step 3: Cross multiply
    28,101.64x = 38,780.54 × 15,355.21
  4. Step 4: Simplify right side
    28,101.64x = 595,483,335.61
  5. Step 5: Solve for x
    x = 595,483,335.61/28,101.64
  6. Step 6: Final answer
    x = 21,190.34

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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.