Home / 21,390.39-29,518.74-12,892.64

Finding the Fourth Proportional to 21,390.39, 29,518.74 and 12,892.64

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Solution

The fourth proportional to 21,390.39, 29,518.74 and 12,892.64 is: 17,791.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.39 : 29,518.74 = 12,892.64 : x
  2. Step 2: Convert to fraction form
    21,390.39/29,518.74 = 12,892.64/x
  3. Step 3: Cross multiply
    21,390.39x = 29,518.74 × 12,892.64
  4. Step 4: Simplify right side
    21,390.39x = 380,574,340.48
  5. Step 5: Solve for x
    x = 380,574,340.48/21,390.39
  6. Step 6: Final answer
    x = 17,791.84

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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.