Home / 13,630.76-20,448.51-5,315.30

Finding the Fourth Proportional to 13,630.76, 20,448.51 and 5,315.30

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Solution

The fourth proportional to 13,630.76, 20,448.51 and 5,315.30 is: 7,973.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,630.76 : 20,448.51 = 5,315.30 : x
  2. Step 2: Convert to fraction form
    13,630.76/20,448.51 = 5,315.30/x
  3. Step 3: Cross multiply
    13,630.76x = 20,448.51 × 5,315.30
  4. Step 4: Simplify right side
    13,630.76x = 108,689,965.20
  5. Step 5: Solve for x
    x = 108,689,965.20/13,630.76
  6. Step 6: Final answer
    x = 7,973.87

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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.