Home / 21,579.64-29,779.54-12,019.27

Finding the Fourth Proportional to 21,579.64, 29,779.54 and 12,019.27

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Solution

The fourth proportional to 21,579.64, 29,779.54 and 12,019.27 is: 16,586.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,579.64 : 29,779.54 = 12,019.27 : x
  2. Step 2: Convert to fraction form
    21,579.64/29,779.54 = 12,019.27/x
  3. Step 3: Cross multiply
    21,579.64x = 29,779.54 × 12,019.27
  4. Step 4: Simplify right side
    21,579.64x = 357,928,331.74
  5. Step 5: Solve for x
    x = 357,928,331.74/21,579.64
  6. Step 6: Final answer
    x = 16,586.39

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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.