Home / 21,488.98-29,656.58-11,929.76

Finding the Fourth Proportional to 21,488.98, 29,656.58 and 11,929.76

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Solution

The fourth proportional to 21,488.98, 29,656.58 and 11,929.76 is: 16,464.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,488.98 : 29,656.58 = 11,929.76 : x
  2. Step 2: Convert to fraction form
    21,488.98/29,656.58 = 11,929.76/x
  3. Step 3: Cross multiply
    21,488.98x = 29,656.58 × 11,929.76
  4. Step 4: Simplify right side
    21,488.98x = 353,795,881.82
  5. Step 5: Solve for x
    x = 353,795,881.82/21,488.98
  6. Step 6: Final answer
    x = 16,464.06

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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.