Home / 21,335.63-31,989.71-8,864.26

Finding the Fourth Proportional to 21,335.63, 31,989.71 and 8,864.26

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Solution

The fourth proportional to 21,335.63, 31,989.71 and 8,864.26 is: 13,290.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,335.63 : 31,989.71 = 8,864.26 : x
  2. Step 2: Convert to fraction form
    21,335.63/31,989.71 = 8,864.26/x
  3. Step 3: Cross multiply
    21,335.63x = 31,989.71 × 8,864.26
  4. Step 4: Simplify right side
    21,335.63x = 283,565,062.44
  5. Step 5: Solve for x
    x = 283,565,062.44/21,335.63
  6. Step 6: Final answer
    x = 13,290.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.