Home / 21,155.80-31,733.70-12,963.80

Finding the Fourth Proportional to 21,155.80, 31,733.70 and 12,963.80

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Solution

The fourth proportional to 21,155.80, 31,733.70 and 12,963.80 is: 19,445.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.80 : 31,733.70 = 12,963.80 : x
  2. Step 2: Convert to fraction form
    21,155.80/31,733.70 = 12,963.80/x
  3. Step 3: Cross multiply
    21,155.80x = 31,733.70 × 12,963.80
  4. Step 4: Simplify right side
    21,155.80x = 411,389,340.06
  5. Step 5: Solve for x
    x = 411,389,340.06/21,155.80
  6. Step 6: Final answer
    x = 19,445.70

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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.