Home / 21,887.63-32,778.81-12,499.19

Finding the Fourth Proportional to 21,887.63, 32,778.81 and 12,499.19

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Solution

The fourth proportional to 21,887.63, 32,778.81 and 12,499.19 is: 18,718.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,887.63 : 32,778.81 = 12,499.19 : x
  2. Step 2: Convert to fraction form
    21,887.63/32,778.81 = 12,499.19/x
  3. Step 3: Cross multiply
    21,887.63x = 32,778.81 × 12,499.19
  4. Step 4: Simplify right side
    21,887.63x = 409,708,622.06
  5. Step 5: Solve for x
    x = 409,708,622.06/21,887.63
  6. Step 6: Final answer
    x = 18,718.73

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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.