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Finding the Fourth Proportional to 18,911.63, 26,101.16 and 14,426.91

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Solution

The fourth proportional to 18,911.63, 26,101.16 and 14,426.91 is: 19,911.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911.63 : 26,101.16 = 14,426.91 : x
  2. Step 2: Convert to fraction form
    18,911.63/26,101.16 = 14,426.91/x
  3. Step 3: Cross multiply
    18,911.63x = 26,101.16 × 14,426.91
  4. Step 4: Simplify right side
    18,911.63x = 376,559,108.76
  5. Step 5: Solve for x
    x = 376,559,108.76/18,911.63
  6. Step 6: Final answer
    x = 19,911.51

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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.