Home / 15,520.94-21,422.92-9,858.40

Finding the Fourth Proportional to 15,520.94, 21,422.92 and 9,858.40

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Solution

The fourth proportional to 15,520.94, 21,422.92 and 9,858.40 is: 13,607.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.94 : 21,422.92 = 9,858.40 : x
  2. Step 2: Convert to fraction form
    15,520.94/21,422.92 = 9,858.40/x
  3. Step 3: Cross multiply
    15,520.94x = 21,422.92 × 9,858.40
  4. Step 4: Simplify right side
    15,520.94x = 211,195,714.53
  5. Step 5: Solve for x
    x = 211,195,714.53/15,520.94
  6. Step 6: Final answer
    x = 13,607.15

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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.