Home / 15,711.26-21,681.70-8,541.21

Finding the Fourth Proportional to 15,711.26, 21,681.70 and 8,541.21

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Solution

The fourth proportional to 15,711.26, 21,681.70 and 8,541.21 is: 11,786.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,711.26 : 21,681.70 = 8,541.21 : x
  2. Step 2: Convert to fraction form
    15,711.26/21,681.70 = 8,541.21/x
  3. Step 3: Cross multiply
    15,711.26x = 21,681.70 × 8,541.21
  4. Step 4: Simplify right side
    15,711.26x = 185,187,952.86
  5. Step 5: Solve for x
    x = 185,187,952.86/15,711.26
  6. Step 6: Final answer
    x = 11,786.96

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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.