Home / 21,579.93-29,778.18-12,019.50

Finding the Fourth Proportional to 21,579.93, 29,778.18 and 12,019.50

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Solution

The fourth proportional to 21,579.93, 29,778.18 and 12,019.50 is: 16,585.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,579.93 : 29,778.18 = 12,019.50 : x
  2. Step 2: Convert to fraction form
    21,579.93/29,778.18 = 12,019.50/x
  3. Step 3: Cross multiply
    21,579.93x = 29,778.18 × 12,019.50
  4. Step 4: Simplify right side
    21,579.93x = 357,918,774.75
  5. Step 5: Solve for x
    x = 357,918,774.75/21,579.93
  6. Step 6: Final answer
    x = 16,585.72

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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.