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Finding the Fourth Proportional to 18,937.63, 26,133.99 and 11,388.30

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Solution

The fourth proportional to 18,937.63, 26,133.99 and 11,388.30 is: 15,715.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,937.63 : 26,133.99 = 11,388.30 : x
  2. Step 2: Convert to fraction form
    18,937.63/26,133.99 = 11,388.30/x
  3. Step 3: Cross multiply
    18,937.63x = 26,133.99 × 11,388.30
  4. Step 4: Simplify right side
    18,937.63x = 297,621,718.32
  5. Step 5: Solve for x
    x = 297,621,718.32/18,937.63
  6. Step 6: Final answer
    x = 15,715.89

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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.