Home / 21,078.12-29,088.90-12,579.24

Finding the Fourth Proportional to 21,078.12, 29,088.90 and 12,579.24

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Solution

The fourth proportional to 21,078.12, 29,088.90 and 12,579.24 is: 17,360.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.12 : 29,088.90 = 12,579.24 : x
  2. Step 2: Convert to fraction form
    21,078.12/29,088.90 = 12,579.24/x
  3. Step 3: Cross multiply
    21,078.12x = 29,088.90 × 12,579.24
  4. Step 4: Simplify right side
    21,078.12x = 365,916,254.44
  5. Step 5: Solve for x
    x = 365,916,254.44/21,078.12
  6. Step 6: Final answer
    x = 17,360.00

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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.