Home / 13,039.20-17,985.96-7,730.28

Finding the Fourth Proportional to 13,039.20, 17,985.96 and 7,730.28

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Solution

The fourth proportional to 13,039.20, 17,985.96 and 7,730.28 is: 10,662.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,039.20 : 17,985.96 = 7,730.28 : x
  2. Step 2: Convert to fraction form
    13,039.20/17,985.96 = 7,730.28/x
  3. Step 3: Cross multiply
    13,039.20x = 17,985.96 × 7,730.28
  4. Step 4: Simplify right side
    13,039.20x = 139,036,506.87
  5. Step 5: Solve for x
    x = 139,036,506.87/13,039.20
  6. Step 6: Final answer
    x = 10,662.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.