Home / 21,640.67-29,864.90-12,565.35

Finding the Fourth Proportional to 21,640.67, 29,864.90 and 12,565.35

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Solution

The fourth proportional to 21,640.67, 29,864.90 and 12,565.35 is: 17,340.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,640.67 : 29,864.90 = 12,565.35 : x
  2. Step 2: Convert to fraction form
    21,640.67/29,864.90 = 12,565.35/x
  3. Step 3: Cross multiply
    21,640.67x = 29,864.90 × 12,565.35
  4. Step 4: Simplify right side
    21,640.67x = 375,262,858.39
  5. Step 5: Solve for x
    x = 375,262,858.39/21,640.67
  6. Step 6: Final answer
    x = 17,340.63

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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.