Home / 15,780.64-21,775.44-9,493.60

Finding the Fourth Proportional to 15,780.64, 21,775.44 and 9,493.60

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Solution

The fourth proportional to 15,780.64, 21,775.44 and 9,493.60 is: 13,100.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,780.64 : 21,775.44 = 9,493.60 : x
  2. Step 2: Convert to fraction form
    15,780.64/21,775.44 = 9,493.60/x
  3. Step 3: Cross multiply
    15,780.64x = 21,775.44 × 9,493.60
  4. Step 4: Simplify right side
    15,780.64x = 206,727,317.18
  5. Step 5: Solve for x
    x = 206,727,317.18/15,780.64
  6. Step 6: Final answer
    x = 13,100.06

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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.