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Finding the Fourth Proportional to 18,920.16, 26,109.82 and 10,966.99

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Solution

The fourth proportional to 18,920.16, 26,109.82 and 10,966.99 is: 15,134.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.16 : 26,109.82 = 10,966.99 : x
  2. Step 2: Convert to fraction form
    18,920.16/26,109.82 = 10,966.99/x
  3. Step 3: Cross multiply
    18,920.16x = 26,109.82 × 10,966.99
  4. Step 4: Simplify right side
    18,920.16x = 286,346,134.84
  5. Step 5: Solve for x
    x = 286,346,134.84/18,920.16
  6. Step 6: Final answer
    x = 15,134.45

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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.