Home / 15,651.78-21,599.40-9,365.64

Finding the Fourth Proportional to 15,651.78, 21,599.40 and 9,365.64

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Solution

The fourth proportional to 15,651.78, 21,599.40 and 9,365.64 is: 12,924.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,651.78 : 21,599.40 = 9,365.64 : x
  2. Step 2: Convert to fraction form
    15,651.78/21,599.40 = 9,365.64/x
  3. Step 3: Cross multiply
    15,651.78x = 21,599.40 × 9,365.64
  4. Step 4: Simplify right side
    15,651.78x = 202,292,204.62
  5. Step 5: Solve for x
    x = 202,292,204.62/15,651.78
  6. Step 6: Final answer
    x = 12,924.55

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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.