Home / 15,489.81-21,375.23-8,776.43

Finding the Fourth Proportional to 15,489.81, 21,375.23 and 8,776.43

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Solution

The fourth proportional to 15,489.81, 21,375.23 and 8,776.43 is: 12,111.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.81 : 21,375.23 = 8,776.43 : x
  2. Step 2: Convert to fraction form
    15,489.81/21,375.23 = 8,776.43/x
  3. Step 3: Cross multiply
    15,489.81x = 21,375.23 × 8,776.43
  4. Step 4: Simplify right side
    15,489.81x = 187,598,139.23
  5. Step 5: Solve for x
    x = 187,598,139.23/15,489.81
  6. Step 6: Final answer
    x = 12,111.07

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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.