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Finding the Fourth Proportional to 15,926.01, 21,980.43 and 9,215.71

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Solution

The fourth proportional to 15,926.01, 21,980.43 and 9,215.71 is: 12,719.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,926.01 : 21,980.43 = 9,215.71 : x
  2. Step 2: Convert to fraction form
    15,926.01/21,980.43 = 9,215.71/x
  3. Step 3: Cross multiply
    15,926.01x = 21,980.43 × 9,215.71
  4. Step 4: Simplify right side
    15,926.01x = 202,565,268.56
  5. Step 5: Solve for x
    x = 202,565,268.56/15,926.01
  6. Step 6: Final answer
    x = 12,719.15

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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.