Home / 21,875.60-30,188.32-11,939.60

Finding the Fourth Proportional to 21,875.60, 30,188.32 and 11,939.60

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Solution

The fourth proportional to 21,875.60, 30,188.32 and 11,939.60 is: 16,476.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,875.60 : 30,188.32 = 11,939.60 : x
  2. Step 2: Convert to fraction form
    21,875.60/30,188.32 = 11,939.60/x
  3. Step 3: Cross multiply
    21,875.60x = 30,188.32 × 11,939.60
  4. Step 4: Simplify right side
    21,875.60x = 360,436,465.47
  5. Step 5: Solve for x
    x = 360,436,465.47/21,875.60
  6. Step 6: Final answer
    x = 16,476.64

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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.