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Finding the Fourth Proportional to 19,191.78, 26,486.28 and 10,809.90

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Solution

The fourth proportional to 19,191.78, 26,486.28 and 10,809.90 is: 14,918.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,191.78 : 26,486.28 = 10,809.90 : x
  2. Step 2: Convert to fraction form
    19,191.78/26,486.28 = 10,809.90/x
  3. Step 3: Cross multiply
    19,191.78x = 26,486.28 × 10,809.90
  4. Step 4: Simplify right side
    19,191.78x = 286,314,038.17
  5. Step 5: Solve for x
    x = 286,314,038.17/19,191.78
  6. Step 6: Final answer
    x = 14,918.58

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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.