Home / 13,638.04-20,459.70-5,317.72

Finding the Fourth Proportional to 13,638.04, 20,459.70 and 5,317.72

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Solution

The fourth proportional to 13,638.04, 20,459.70 and 5,317.72 is: 7,977.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.04 : 20,459.70 = 5,317.72 : x
  2. Step 2: Convert to fraction form
    13,638.04/20,459.70 = 5,317.72/x
  3. Step 3: Cross multiply
    13,638.04x = 20,459.70 × 5,317.72
  4. Step 4: Simplify right side
    13,638.04x = 108,798,955.88
  5. Step 5: Solve for x
    x = 108,798,955.88/13,638.04
  6. Step 6: Final answer
    x = 7,977.61

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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.