Home / 15,853.21-21,872.47-9,137.92

Finding the Fourth Proportional to 15,853.21, 21,872.47 and 9,137.92

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Solution

The fourth proportional to 15,853.21, 21,872.47 and 9,137.92 is: 12,607.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,853.21 : 21,872.47 = 9,137.92 : x
  2. Step 2: Convert to fraction form
    15,853.21/21,872.47 = 9,137.92/x
  3. Step 3: Cross multiply
    15,853.21x = 21,872.47 × 9,137.92
  4. Step 4: Simplify right side
    15,853.21x = 199,868,881.06
  5. Step 5: Solve for x
    x = 199,868,881.06/15,853.21
  6. Step 6: Final answer
    x = 12,607.47

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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.