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Finding the Fourth Proportional to 18,959.81, 26,159.74 and 11,403.71

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Solution

The fourth proportional to 18,959.81, 26,159.74 and 11,403.71 is: 15,734.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,959.81 : 26,159.74 = 11,403.71 : x
  2. Step 2: Convert to fraction form
    18,959.81/26,159.74 = 11,403.71/x
  3. Step 3: Cross multiply
    18,959.81x = 26,159.74 × 11,403.71
  4. Step 4: Simplify right side
    18,959.81x = 298,318,088.64
  5. Step 5: Solve for x
    x = 298,318,088.64/18,959.81
  6. Step 6: Final answer
    x = 15,734.23

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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.