Home / 21,520.73-29,693.99-12,564.15

Finding the Fourth Proportional to 21,520.73, 29,693.99 and 12,564.15

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Solution

The fourth proportional to 21,520.73, 29,693.99 and 12,564.15 is: 17,335.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,520.73 : 29,693.99 = 12,564.15 : x
  2. Step 2: Convert to fraction form
    21,520.73/29,693.99 = 12,564.15/x
  3. Step 3: Cross multiply
    21,520.73x = 29,693.99 × 12,564.15
  4. Step 4: Simplify right side
    21,520.73x = 373,079,681.64
  5. Step 5: Solve for x
    x = 373,079,681.64/21,520.73
  6. Step 6: Final answer
    x = 17,335.83

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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.