Home / 11,128.47-15,356.90-6,651.20

Finding the Fourth Proportional to 11,128.47, 15,356.90 and 6,651.20

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Solution

The fourth proportional to 11,128.47, 15,356.90 and 6,651.20 is: 9,178.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,128.47 : 15,356.90 = 6,651.20 : x
  2. Step 2: Convert to fraction form
    11,128.47/15,356.90 = 6,651.20/x
  3. Step 3: Cross multiply
    11,128.47x = 15,356.90 × 6,651.20
  4. Step 4: Simplify right side
    11,128.47x = 102,141,703.24
  5. Step 5: Solve for x
    x = 102,141,703.24/11,128.47
  6. Step 6: Final answer
    x = 9,178.41

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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.