Home / 21,958.80-30,302.32-12,530.40

Finding the Fourth Proportional to 21,958.80, 30,302.32 and 12,530.40

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Solution

The fourth proportional to 21,958.80, 30,302.32 and 12,530.40 is: 17,291.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,958.80 : 30,302.32 = 12,530.40 : x
  2. Step 2: Convert to fraction form
    21,958.80/30,302.32 = 12,530.40/x
  3. Step 3: Cross multiply
    21,958.80x = 30,302.32 × 12,530.40
  4. Step 4: Simplify right side
    21,958.80x = 379,700,190.53
  5. Step 5: Solve for x
    x = 379,700,190.53/21,958.80
  6. Step 6: Final answer
    x = 17,291.48

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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.