Home / 21,437.88-29,579.19-12,480

Finding the Fourth Proportional to 21,437.88, 29,579.19 and 12,480

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Solution

The fourth proportional to 21,437.88, 29,579.19 and 12,480 is: 17,219.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,437.88 : 29,579.19 = 12,480 : x
  2. Step 2: Convert to fraction form
    21,437.88/29,579.19 = 12,480/x
  3. Step 3: Cross multiply
    21,437.88x = 29,579.19 × 12,480
  4. Step 4: Simplify right side
    21,437.88x = 369,148,291.20
  5. Step 5: Solve for x
    x = 369,148,291.20/21,437.88
  6. Step 6: Final answer
    x = 17,219.44

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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.