Home / 20,901.09-28,841.60-12,401.75

Finding the Fourth Proportional to 20,901.09, 28,841.60 and 12,401.75

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Solution

The fourth proportional to 20,901.09, 28,841.60 and 12,401.75 is: 17,113.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901.09 : 28,841.60 = 12,401.75 : x
  2. Step 2: Convert to fraction form
    20,901.09/28,841.60 = 12,401.75/x
  3. Step 3: Cross multiply
    20,901.09x = 28,841.60 × 12,401.75
  4. Step 4: Simplify right side
    20,901.09x = 357,686,312.80
  5. Step 5: Solve for x
    x = 357,686,312.80/20,901.09
  6. Step 6: Final answer
    x = 17,113.29

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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.