Home / 11,178.47-15,421.88-7,201.91

Finding the Fourth Proportional to 11,178.47, 15,421.88 and 7,201.91

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Solution

The fourth proportional to 11,178.47, 15,421.88 and 7,201.91 is: 9,935.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,178.47 : 15,421.88 = 7,201.91 : x
  2. Step 2: Convert to fraction form
    11,178.47/15,421.88 = 7,201.91/x
  3. Step 3: Cross multiply
    11,178.47x = 15,421.88 × 7,201.91
  4. Step 4: Simplify right side
    11,178.47x = 111,066,897.95
  5. Step 5: Solve for x
    x = 111,066,897.95/11,178.47
  6. Step 6: Final answer
    x = 9,935.78

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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.