Home / 11,421.54-15,756.12-7,170.48

Finding the Fourth Proportional to 11,421.54, 15,756.12 and 7,170.48

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Solution

The fourth proportional to 11,421.54, 15,756.12 and 7,170.48 is: 9,891.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,421.54 : 15,756.12 = 7,170.48 : x
  2. Step 2: Convert to fraction form
    11,421.54/15,756.12 = 7,170.48/x
  3. Step 3: Cross multiply
    11,421.54x = 15,756.12 × 7,170.48
  4. Step 4: Simplify right side
    11,421.54x = 112,978,943.34
  5. Step 5: Solve for x
    x = 112,978,943.34/11,421.54
  6. Step 6: Final answer
    x = 9,891.74

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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.