Home / 21,510.10-29,679.09-12,078.04

Finding the Fourth Proportional to 21,510.10, 29,679.09 and 12,078.04

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Solution

The fourth proportional to 21,510.10, 29,679.09 and 12,078.04 is: 16,664.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,510.10 : 29,679.09 = 12,078.04 : x
  2. Step 2: Convert to fraction form
    21,510.10/29,679.09 = 12,078.04/x
  3. Step 3: Cross multiply
    21,510.10x = 29,679.09 × 12,078.04
  4. Step 4: Simplify right side
    21,510.10x = 358,465,236.18
  5. Step 5: Solve for x
    x = 358,465,236.18/21,510.10
  6. Step 6: Final answer
    x = 16,664.97

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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.