Home / 21,570.64-29,766.35-12,139.81

Finding the Fourth Proportional to 21,570.64, 29,766.35 and 12,139.81

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Solution

The fourth proportional to 21,570.64, 29,766.35 and 12,139.81 is: 16,752.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,570.64 : 29,766.35 = 12,139.81 : x
  2. Step 2: Convert to fraction form
    21,570.64/29,766.35 = 12,139.81/x
  3. Step 3: Cross multiply
    21,570.64x = 29,766.35 × 12,139.81
  4. Step 4: Simplify right side
    21,570.64x = 361,357,789.33
  5. Step 5: Solve for x
    x = 361,357,789.33/21,570.64
  6. Step 6: Final answer
    x = 16,752.30

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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.