Home / 21,729.92-29,987.71-14,181.08

Finding the Fourth Proportional to 21,729.92, 29,987.71 and 14,181.08

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Solution

The fourth proportional to 21,729.92, 29,987.71 and 14,181.08 is: 19,570.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,729.92 : 29,987.71 = 14,181.08 : x
  2. Step 2: Convert to fraction form
    21,729.92/29,987.71 = 14,181.08/x
  3. Step 3: Cross multiply
    21,729.92x = 29,987.71 × 14,181.08
  4. Step 4: Simplify right side
    21,729.92x = 425,257,929.14
  5. Step 5: Solve for x
    x = 425,257,929.14/21,729.92
  6. Step 6: Final answer
    x = 19,570.16

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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.