Home / 21,854.56-30,161.36-12,904.80

Finding the Fourth Proportional to 21,854.56, 30,161.36 and 12,904.80

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Solution

The fourth proportional to 21,854.56, 30,161.36 and 12,904.80 is: 17,809.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,854.56 : 30,161.36 = 12,904.80 : x
  2. Step 2: Convert to fraction form
    21,854.56/30,161.36 = 12,904.80/x
  3. Step 3: Cross multiply
    21,854.56x = 30,161.36 × 12,904.80
  4. Step 4: Simplify right side
    21,854.56x = 389,226,318.53
  5. Step 5: Solve for x
    x = 389,226,318.53/21,854.56
  6. Step 6: Final answer
    x = 17,809.84

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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.