Home / 21,340.67-29,455.40-12,964.19

Finding the Fourth Proportional to 21,340.67, 29,455.40 and 12,964.19

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Solution

The fourth proportional to 21,340.67, 29,455.40 and 12,964.19 is: 17,893.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,340.67 : 29,455.40 = 12,964.19 : x
  2. Step 2: Convert to fraction form
    21,340.67/29,455.40 = 12,964.19/x
  3. Step 3: Cross multiply
    21,340.67x = 29,455.40 × 12,964.19
  4. Step 4: Simplify right side
    21,340.67x = 381,865,402.13
  5. Step 5: Solve for x
    x = 381,865,402.13/21,340.67
  6. Step 6: Final answer
    x = 17,893.79

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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.