Home / 21,252.90-31,878.12-8,106.60

Finding the Fourth Proportional to 21,252.90, 31,878.12 and 8,106.60

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Solution

The fourth proportional to 21,252.90, 31,878.12 and 8,106.60 is: 12,159.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,252.90 : 31,878.12 = 8,106.60 : x
  2. Step 2: Convert to fraction form
    21,252.90/31,878.12 = 8,106.60/x
  3. Step 3: Cross multiply
    21,252.90x = 31,878.12 × 8,106.60
  4. Step 4: Simplify right side
    21,252.90x = 258,423,167.59
  5. Step 5: Solve for x
    x = 258,423,167.59/21,252.90
  6. Step 6: Final answer
    x = 12,159.43

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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.