Home / 21,869.60-30,178.32-12,436.16

Finding the Fourth Proportional to 21,869.60, 30,178.32 and 12,436.16

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Solution

The fourth proportional to 21,869.60, 30,178.32 and 12,436.16 is: 17,160.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,869.60 : 30,178.32 = 12,436.16 : x
  2. Step 2: Convert to fraction form
    21,869.60/30,178.32 = 12,436.16/x
  3. Step 3: Cross multiply
    21,869.60x = 30,178.32 × 12,436.16
  4. Step 4: Simplify right side
    21,869.60x = 375,302,416.05
  5. Step 5: Solve for x
    x = 375,302,416.05/21,869.60
  6. Step 6: Final answer
    x = 17,160.92

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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.