Home / 21,681.60-29,916.90-12,249.96

Finding the Fourth Proportional to 21,681.60, 29,916.90 and 12,249.96

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Solution

The fourth proportional to 21,681.60, 29,916.90 and 12,249.96 is: 16,902.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,681.60 : 29,916.90 = 12,249.96 : x
  2. Step 2: Convert to fraction form
    21,681.60/29,916.90 = 12,249.96/x
  3. Step 3: Cross multiply
    21,681.60x = 29,916.90 × 12,249.96
  4. Step 4: Simplify right side
    21,681.60x = 366,480,828.32
  5. Step 5: Solve for x
    x = 366,480,828.32/21,681.60
  6. Step 6: Final answer
    x = 16,902.85

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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.