Home / 15,315.25-21,134.97-8,601.47

Finding the Fourth Proportional to 15,315.25, 21,134.97 and 8,601.47

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Solution

The fourth proportional to 15,315.25, 21,134.97 and 8,601.47 is: 11,869.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,315.25 : 21,134.97 = 8,601.47 : x
  2. Step 2: Convert to fraction form
    15,315.25/21,134.97 = 8,601.47/x
  3. Step 3: Cross multiply
    15,315.25x = 21,134.97 × 8,601.47
  4. Step 4: Simplify right side
    15,315.25x = 181,791,810.41
  5. Step 5: Solve for x
    x = 181,791,810.41/15,315.25
  6. Step 6: Final answer
    x = 11,869.99

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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.