Home / 21,639.48-29,862.18-12,211.08

Finding the Fourth Proportional to 21,639.48, 29,862.18 and 12,211.08

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Solution

The fourth proportional to 21,639.48, 29,862.18 and 12,211.08 is: 16,851.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,639.48 : 29,862.18 = 12,211.08 : x
  2. Step 2: Convert to fraction form
    21,639.48/29,862.18 = 12,211.08/x
  3. Step 3: Cross multiply
    21,639.48x = 29,862.18 × 12,211.08
  4. Step 4: Simplify right side
    21,639.48x = 364,649,468.95
  5. Step 5: Solve for x
    x = 364,649,468.95/21,639.48
  6. Step 6: Final answer
    x = 16,851.12

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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.