Home / 21,017.95-29,005.38-11,587.12

Finding the Fourth Proportional to 21,017.95, 29,005.38 and 11,587.12

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Solution

The fourth proportional to 21,017.95, 29,005.38 and 11,587.12 is: 15,990.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,017.95 : 29,005.38 = 11,587.12 : x
  2. Step 2: Convert to fraction form
    21,017.95/29,005.38 = 11,587.12/x
  3. Step 3: Cross multiply
    21,017.95x = 29,005.38 × 11,587.12
  4. Step 4: Simplify right side
    21,017.95x = 336,088,941.94
  5. Step 5: Solve for x
    x = 336,088,941.94/21,017.95
  6. Step 6: Final answer
    x = 15,990.56

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Similar ratio
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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.