Home / 21,104.04-29,130.94-12,155.16

Finding the Fourth Proportional to 21,104.04, 29,130.94 and 12,155.16

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Solution

The fourth proportional to 21,104.04, 29,130.94 and 12,155.16 is: 16,778.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,104.04 : 29,130.94 = 12,155.16 : x
  2. Step 2: Convert to fraction form
    21,104.04/29,130.94 = 12,155.16/x
  3. Step 3: Cross multiply
    21,104.04x = 29,130.94 × 12,155.16
  4. Step 4: Simplify right side
    21,104.04x = 354,091,236.65
  5. Step 5: Solve for x
    x = 354,091,236.65/21,104.04
  6. Step 6: Final answer
    x = 16,778.36

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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.