Home / 21,479.12-29,638.32-12,525.92

Finding the Fourth Proportional to 21,479.12, 29,638.32 and 12,525.92

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Solution

The fourth proportional to 21,479.12, 29,638.32 and 12,525.92 is: 17,284.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,479.12 : 29,638.32 = 12,525.92 : x
  2. Step 2: Convert to fraction form
    21,479.12/29,638.32 = 12,525.92/x
  3. Step 3: Cross multiply
    21,479.12x = 29,638.32 × 12,525.92
  4. Step 4: Simplify right side
    21,479.12x = 371,247,225.25
  5. Step 5: Solve for x
    x = 371,247,225.25/21,479.12
  6. Step 6: Final answer
    x = 17,284.10

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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.