Home / 21,655.80-29,881.98-12,095.28

Finding the Fourth Proportional to 21,655.80, 29,881.98 and 12,095.28

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Solution

The fourth proportional to 21,655.80, 29,881.98 and 12,095.28 is: 16,689.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,655.80 : 29,881.98 = 12,095.28 : x
  2. Step 2: Convert to fraction form
    21,655.80/29,881.98 = 12,095.28/x
  3. Step 3: Cross multiply
    21,655.80x = 29,881.98 × 12,095.28
  4. Step 4: Simplify right side
    21,655.80x = 361,430,915.05
  5. Step 5: Solve for x
    x = 361,430,915.05/21,655.80
  6. Step 6: Final answer
    x = 16,689.80

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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.