Home / 13,427.90-20,122.65-9,890.30

Finding the Fourth Proportional to 13,427.90, 20,122.65 and 9,890.30

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Solution

The fourth proportional to 13,427.90, 20,122.65 and 9,890.30 is: 14,821.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,427.90 : 20,122.65 = 9,890.30 : x
  2. Step 2: Convert to fraction form
    13,427.90/20,122.65 = 9,890.30/x
  3. Step 3: Cross multiply
    13,427.90x = 20,122.65 × 9,890.30
  4. Step 4: Simplify right side
    13,427.90x = 199,019,045.30
  5. Step 5: Solve for x
    x = 199,019,045.30/13,427.90
  6. Step 6: Final answer
    x = 14,821.31

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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.