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Finding the Fourth Proportional to 18,642.29, 25,733.16 and 12,356.69

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Solution

The fourth proportional to 18,642.29, 25,733.16 and 12,356.69 is: 17,056.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,642.29 : 25,733.16 = 12,356.69 : x
  2. Step 2: Convert to fraction form
    18,642.29/25,733.16 = 12,356.69/x
  3. Step 3: Cross multiply
    18,642.29x = 25,733.16 × 12,356.69
  4. Step 4: Simplify right side
    18,642.29x = 317,976,552.17
  5. Step 5: Solve for x
    x = 317,976,552.17/18,642.29
  6. Step 6: Final answer
    x = 17,056.74

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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.