Home / 21,310.80-29,421.51-18,946.40

Finding the Fourth Proportional to 21,310.80, 29,421.51 and 18,946.40

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Solution

The fourth proportional to 21,310.80, 29,421.51 and 18,946.40 is: 26,157.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.80 : 29,421.51 = 18,946.40 : x
  2. Step 2: Convert to fraction form
    21,310.80/29,421.51 = 18,946.40/x
  3. Step 3: Cross multiply
    21,310.80x = 29,421.51 × 18,946.40
  4. Step 4: Simplify right side
    21,310.80x = 557,431,770.62
  5. Step 5: Solve for x
    x = 557,431,770.62/21,310.80
  6. Step 6: Final answer
    x = 26,157.24

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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.