Home / 20,085.74-27,718.28-12,126.40

Finding the Fourth Proportional to 20,085.74, 27,718.28 and 12,126.40

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Solution

The fourth proportional to 20,085.74, 27,718.28 and 12,126.40 is: 16,734.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,085.74 : 27,718.28 = 12,126.40 : x
  2. Step 2: Convert to fraction form
    20,085.74/27,718.28 = 12,126.40/x
  3. Step 3: Cross multiply
    20,085.74x = 27,718.28 × 12,126.40
  4. Step 4: Simplify right side
    20,085.74x = 336,122,950.59
  5. Step 5: Solve for x
    x = 336,122,950.59/20,085.74
  6. Step 6: Final answer
    x = 16,734.41

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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.