Home / 21,688.67-29,931.09-12,257.84

Finding the Fourth Proportional to 21,688.67, 29,931.09 and 12,257.84

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Solution

The fourth proportional to 21,688.67, 29,931.09 and 12,257.84 is: 16,916.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,688.67 : 29,931.09 = 12,257.84 : x
  2. Step 2: Convert to fraction form
    21,688.67/29,931.09 = 12,257.84/x
  3. Step 3: Cross multiply
    21,688.67x = 29,931.09 × 12,257.84
  4. Step 4: Simplify right side
    21,688.67x = 366,890,512.25
  5. Step 5: Solve for x
    x = 366,890,512.25/21,688.67
  6. Step 6: Final answer
    x = 16,916.23

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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.