Home / 21,730.30-29,986.77-13,345.18

Finding the Fourth Proportional to 21,730.30, 29,986.77 and 13,345.18

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Solution

The fourth proportional to 21,730.30, 29,986.77 and 13,345.18 is: 18,415.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,730.30 : 29,986.77 = 13,345.18 : x
  2. Step 2: Convert to fraction form
    21,730.30/29,986.77 = 13,345.18/x
  3. Step 3: Cross multiply
    21,730.30x = 29,986.77 × 13,345.18
  4. Step 4: Simplify right side
    21,730.30x = 400,178,818.35
  5. Step 5: Solve for x
    x = 400,178,818.35/21,730.30
  6. Step 6: Final answer
    x = 18,415.71

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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.