Home / 21,807.90-30,091.26-12,854.19

Finding the Fourth Proportional to 21,807.90, 30,091.26 and 12,854.19

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Solution

The fourth proportional to 21,807.90, 30,091.26 and 12,854.19 is: 17,736.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,807.90 : 30,091.26 = 12,854.19 : x
  2. Step 2: Convert to fraction form
    21,807.90/30,091.26 = 12,854.19/x
  3. Step 3: Cross multiply
    21,807.90x = 30,091.26 × 12,854.19
  4. Step 4: Simplify right side
    21,807.90x = 386,798,934.42
  5. Step 5: Solve for x
    x = 386,798,934.42/21,807.90
  6. Step 6: Final answer
    x = 17,736.64

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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.