Home / 21,686.36-29,926.90-12,732.32

Finding the Fourth Proportional to 21,686.36, 29,926.90 and 12,732.32

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Solution

The fourth proportional to 21,686.36, 29,926.90 and 12,732.32 is: 17,570.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,686.36 : 29,926.90 = 12,732.32 : x
  2. Step 2: Convert to fraction form
    21,686.36/29,926.90 = 12,732.32/x
  3. Step 3: Cross multiply
    21,686.36x = 29,926.90 × 12,732.32
  4. Step 4: Simplify right side
    21,686.36x = 381,038,867.41
  5. Step 5: Solve for x
    x = 381,038,867.41/21,686.36
  6. Step 6: Final answer
    x = 17,570.44

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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.