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Finding the Fourth Proportional to 17,887.80, 26,810.10 and 9,118.20

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Solution

The fourth proportional to 17,887.80, 26,810.10 and 9,118.20 is: 13,666.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,887.80 : 26,810.10 = 9,118.20 : x
  2. Step 2: Convert to fraction form
    17,887.80/26,810.10 = 9,118.20/x
  3. Step 3: Cross multiply
    17,887.80x = 26,810.10 × 9,118.20
  4. Step 4: Simplify right side
    17,887.80x = 244,459,853.82
  5. Step 5: Solve for x
    x = 244,459,853.82/17,887.80
  6. Step 6: Final answer
    x = 13,666.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.