Home / 21,017.26-28,981.56-18,901.18

Finding the Fourth Proportional to 21,017.26, 28,981.56 and 18,901.18

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Solution

The fourth proportional to 21,017.26, 28,981.56 and 18,901.18 is: 26,063.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,017.26 : 28,981.56 = 18,901.18 : x
  2. Step 2: Convert to fraction form
    21,017.26/28,981.56 = 18,901.18/x
  3. Step 3: Cross multiply
    21,017.26x = 28,981.56 × 18,901.18
  4. Step 4: Simplify right side
    21,017.26x = 547,785,682.24
  5. Step 5: Solve for x
    x = 547,785,682.24/21,017.26
  6. Step 6: Final answer
    x = 26,063.61

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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.