Home / 20,001.40-30,002.10-16,720.90

Finding the Fourth Proportional to 20,001.40, 30,002.10 and 16,720.90

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Solution

The fourth proportional to 20,001.40, 30,002.10 and 16,720.90 is: 25,081.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,001.40 : 30,002.10 = 16,720.90 : x
  2. Step 2: Convert to fraction form
    20,001.40/30,002.10 = 16,720.90/x
  3. Step 3: Cross multiply
    20,001.40x = 30,002.10 × 16,720.90
  4. Step 4: Simplify right side
    20,001.40x = 501,662,113.89
  5. Step 5: Solve for x
    x = 501,662,113.89/20,001.40
  6. Step 6: Final answer
    x = 25,081.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.