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Finding the Fourth Proportional to 18,978.12, 26,189.94 and 10,595.08

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Solution

The fourth proportional to 18,978.12, 26,189.94 and 10,595.08 is: 14,621.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,978.12 : 26,189.94 = 10,595.08 : x
  2. Step 2: Convert to fraction form
    18,978.12/26,189.94 = 10,595.08/x
  3. Step 3: Cross multiply
    18,978.12x = 26,189.94 × 10,595.08
  4. Step 4: Simplify right side
    18,978.12x = 277,484,509.50
  5. Step 5: Solve for x
    x = 277,484,509.50/18,978.12
  6. Step 6: Final answer
    x = 14,621.29

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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.