Home / 15,381.10-21,226.80-9,411.10

Finding the Fourth Proportional to 15,381.10, 21,226.80 and 9,411.10

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Solution

The fourth proportional to 15,381.10, 21,226.80 and 9,411.10 is: 12,987.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,381.10 : 21,226.80 = 9,411.10 : x
  2. Step 2: Convert to fraction form
    15,381.10/21,226.80 = 9,411.10/x
  3. Step 3: Cross multiply
    15,381.10x = 21,226.80 × 9,411.10
  4. Step 4: Simplify right side
    15,381.10x = 199,767,537.48
  5. Step 5: Solve for x
    x = 199,767,537.48/15,381.10
  6. Step 6: Final answer
    x = 12,987.86

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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.