Home / 19,887.60-27,447.09-11,931.78

Finding the Fourth Proportional to 19,887.60, 27,447.09 and 11,931.78

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Solution

The fourth proportional to 19,887.60, 27,447.09 and 11,931.78 is: 16,467.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,887.60 : 27,447.09 = 11,931.78 : x
  2. Step 2: Convert to fraction form
    19,887.60/27,447.09 = 11,931.78/x
  3. Step 3: Cross multiply
    19,887.60x = 27,447.09 × 11,931.78
  4. Step 4: Simplify right side
    19,887.60x = 327,492,639.52
  5. Step 5: Solve for x
    x = 327,492,639.52/19,887.60
  6. Step 6: Final answer
    x = 16,467.18

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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.