Home / 21,017.71-29,003.29-11,585.53

Finding the Fourth Proportional to 21,017.71, 29,003.29 and 11,585.53

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Solution

The fourth proportional to 21,017.71, 29,003.29 and 11,585.53 is: 15,987.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,017.71 : 29,003.29 = 11,585.53 : x
  2. Step 2: Convert to fraction form
    21,017.71/29,003.29 = 11,585.53/x
  3. Step 3: Cross multiply
    21,017.71x = 29,003.29 × 11,585.53
  4. Step 4: Simplify right side
    21,017.71x = 336,018,486.39
  5. Step 5: Solve for x
    x = 336,018,486.39/21,017.71
  6. Step 6: Final answer
    x = 15,987.40

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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.