Home / 19,986.10-29,921.55-12,210.10

Finding the Fourth Proportional to 19,986.10, 29,921.55 and 12,210.10

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Solution

The fourth proportional to 19,986.10, 29,921.55 and 12,210.10 is: 18,279.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,986.10 : 29,921.55 = 12,210.10 : x
  2. Step 2: Convert to fraction form
    19,986.10/29,921.55 = 12,210.10/x
  3. Step 3: Cross multiply
    19,986.10x = 29,921.55 × 12,210.10
  4. Step 4: Simplify right side
    19,986.10x = 365,345,117.66
  5. Step 5: Solve for x
    x = 365,345,117.66/19,986.10
  6. Step 6: Final answer
    x = 18,279.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.