Home / 21,482.61-29,638.87-12,987.33

Finding the Fourth Proportional to 21,482.61, 29,638.87 and 12,987.33

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Solution

The fourth proportional to 21,482.61, 29,638.87 and 12,987.33 is: 17,918.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,482.61 : 29,638.87 = 12,987.33 : x
  2. Step 2: Convert to fraction form
    21,482.61/29,638.87 = 12,987.33/x
  3. Step 3: Cross multiply
    21,482.61x = 29,638.87 × 12,987.33
  4. Step 4: Simplify right side
    21,482.61x = 384,929,785.52
  5. Step 5: Solve for x
    x = 384,929,785.52/21,482.61
  6. Step 6: Final answer
    x = 17,918.20

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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.