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Finding the Fourth Proportional to 18,978.50, 26,190.45 and 10,595.06

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Solution

The fourth proportional to 18,978.50, 26,190.45 and 10,595.06 is: 14,621.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,978.50 : 26,190.45 = 10,595.06 : x
  2. Step 2: Convert to fraction form
    18,978.50/26,190.45 = 10,595.06/x
  3. Step 3: Cross multiply
    18,978.50x = 26,190.45 × 10,595.06
  4. Step 4: Simplify right side
    18,978.50x = 277,489,389.18
  5. Step 5: Solve for x
    x = 277,489,389.18/18,978.50
  6. Step 6: Final answer
    x = 14,621.25

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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.