Home / 21,743.59-30,019.40-20,403.31

Finding the Fourth Proportional to 21,743.59, 30,019.40 and 20,403.31

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Solution

The fourth proportional to 21,743.59, 30,019.40 and 20,403.31 is: 28,169.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,743.59 : 30,019.40 = 20,403.31 : x
  2. Step 2: Convert to fraction form
    21,743.59/30,019.40 = 20,403.31/x
  3. Step 3: Cross multiply
    21,743.59x = 30,019.40 × 20,403.31
  4. Step 4: Simplify right side
    21,743.59x = 612,495,124.21
  5. Step 5: Solve for x
    x = 612,495,124.21/21,743.59
  6. Step 6: Final answer
    x = 28,169.00

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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.