Home / 21,689.36-29,931.90-12,257.72

Finding the Fourth Proportional to 21,689.36, 29,931.90 and 12,257.72

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Solution

The fourth proportional to 21,689.36, 29,931.90 and 12,257.72 is: 16,915.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,689.36 : 29,931.90 = 12,257.72 : x
  2. Step 2: Convert to fraction form
    21,689.36/29,931.90 = 12,257.72/x
  3. Step 3: Cross multiply
    21,689.36x = 29,931.90 × 12,257.72
  4. Step 4: Simplify right side
    21,689.36x = 366,896,849.27
  5. Step 5: Solve for x
    x = 366,896,849.27/21,689.36
  6. Step 6: Final answer
    x = 16,915.98

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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.