Home / 21,437.08-29,578.34-12,940.58

Finding the Fourth Proportional to 21,437.08, 29,578.34 and 12,940.58

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Solution

The fourth proportional to 21,437.08, 29,578.34 and 12,940.58 is: 17,855.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,437.08 : 29,578.34 = 12,940.58 : x
  2. Step 2: Convert to fraction form
    21,437.08/29,578.34 = 12,940.58/x
  3. Step 3: Cross multiply
    21,437.08x = 29,578.34 × 12,940.58
  4. Step 4: Simplify right side
    21,437.08x = 382,760,875.04
  5. Step 5: Solve for x
    x = 382,760,875.04/21,437.08
  6. Step 6: Final answer
    x = 17,855.08

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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.