Home / 15,521.51-21,418.78-8,714.90

Finding the Fourth Proportional to 15,521.51, 21,418.78 and 8,714.90

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Solution

The fourth proportional to 15,521.51, 21,418.78 and 8,714.90 is: 12,026.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.51 : 21,418.78 = 8,714.90 : x
  2. Step 2: Convert to fraction form
    15,521.51/21,418.78 = 8,714.90/x
  3. Step 3: Cross multiply
    15,521.51x = 21,418.78 × 8,714.90
  4. Step 4: Simplify right side
    15,521.51x = 186,662,525.82
  5. Step 5: Solve for x
    x = 186,662,525.82/15,521.51
  6. Step 6: Final answer
    x = 12,026.05

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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.