Home / 21,394.95-29,520.29-13,434.27

Finding the Fourth Proportional to 21,394.95, 29,520.29 and 13,434.27

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Solution

The fourth proportional to 21,394.95, 29,520.29 and 13,434.27 is: 18,536.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,394.95 : 29,520.29 = 13,434.27 : x
  2. Step 2: Convert to fraction form
    21,394.95/29,520.29 = 13,434.27/x
  3. Step 3: Cross multiply
    21,394.95x = 29,520.29 × 13,434.27
  4. Step 4: Simplify right side
    21,394.95x = 396,583,479.17
  5. Step 5: Solve for x
    x = 396,583,479.17/21,394.95
  6. Step 6: Final answer
    x = 18,536.31

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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.