Home / 20,461.22-30,692.45-7,980.74

Finding the Fourth Proportional to 20,461.22, 30,692.45 and 7,980.74

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Solution

The fourth proportional to 20,461.22, 30,692.45 and 7,980.74 is: 11,971.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,461.22 : 30,692.45 = 7,980.74 : x
  2. Step 2: Convert to fraction form
    20,461.22/30,692.45 = 7,980.74/x
  3. Step 3: Cross multiply
    20,461.22x = 30,692.45 × 7,980.74
  4. Step 4: Simplify right side
    20,461.22x = 244,948,423.51
  5. Step 5: Solve for x
    x = 244,948,423.51/20,461.22
  6. Step 6: Final answer
    x = 11,971.35

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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.