Home / 11,178.02-15,412.87-7,139.36

Finding the Fourth Proportional to 11,178.02, 15,412.87 and 7,139.36

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Solution

The fourth proportional to 11,178.02, 15,412.87 and 7,139.36 is: 9,844.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,178.02 : 15,412.87 = 7,139.36 : x
  2. Step 2: Convert to fraction form
    11,178.02/15,412.87 = 7,139.36/x
  3. Step 3: Cross multiply
    11,178.02x = 15,412.87 × 7,139.36
  4. Step 4: Simplify right side
    11,178.02x = 110,038,027.56
  5. Step 5: Solve for x
    x = 110,038,027.56/11,178.02
  6. Step 6: Final answer
    x = 9,844.14

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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.