Home / 7,980.10-11,012.28-4,443.12

Finding the Fourth Proportional to 7,980.10, 11,012.28 and 4,443.12

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Solution

The fourth proportional to 7,980.10, 11,012.28 and 4,443.12 is: 6,131.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,980.10 : 11,012.28 = 4,443.12 : x
  2. Step 2: Convert to fraction form
    7,980.10/11,012.28 = 4,443.12/x
  3. Step 3: Cross multiply
    7,980.10x = 11,012.28 × 4,443.12
  4. Step 4: Simplify right side
    7,980.10x = 48,928,881.51
  5. Step 5: Solve for x
    x = 48,928,881.51/7,980.10
  6. Step 6: Final answer
    x = 6,131.36

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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.