Home / 11,931.90-16,458.66-7,681.56

Finding the Fourth Proportional to 11,931.90, 16,458.66 and 7,681.56

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Solution

The fourth proportional to 11,931.90, 16,458.66 and 7,681.56 is: 10,595.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,931.90 : 16,458.66 = 7,681.56 : x
  2. Step 2: Convert to fraction form
    11,931.90/16,458.66 = 7,681.56/x
  3. Step 3: Cross multiply
    11,931.90x = 16,458.66 × 7,681.56
  4. Step 4: Simplify right side
    11,931.90x = 126,428,184.31
  5. Step 5: Solve for x
    x = 126,428,184.31/11,931.90
  6. Step 6: Final answer
    x = 10,595.81

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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.