Home / 13,827.20-20,751.36-10,139.20

Finding the Fourth Proportional to 13,827.20, 20,751.36 and 10,139.20

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Solution

The fourth proportional to 13,827.20, 20,751.36 and 10,139.20 is: 15,216.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,827.20 : 20,751.36 = 10,139.20 : x
  2. Step 2: Convert to fraction form
    13,827.20/20,751.36 = 10,139.20/x
  3. Step 3: Cross multiply
    13,827.20x = 20,751.36 × 10,139.20
  4. Step 4: Simplify right side
    13,827.20x = 210,402,189.31
  5. Step 5: Solve for x
    x = 210,402,189.31/13,827.20
  6. Step 6: Final answer
    x = 15,216.54

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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.