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Finding the Fourth Proportional to 13,710.60, 18,920.43 and 7,422.93

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Solution

The fourth proportional to 13,710.60, 18,920.43 and 7,422.93 is: 10,243.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,710.60 : 18,920.43 = 7,422.93 : x
  2. Step 2: Convert to fraction form
    13,710.60/18,920.43 = 7,422.93/x
  3. Step 3: Cross multiply
    13,710.60x = 18,920.43 × 7,422.93
  4. Step 4: Simplify right side
    13,710.60x = 140,445,027.46
  5. Step 5: Solve for x
    x = 140,445,027.46/13,710.60
  6. Step 6: Final answer
    x = 10,243.54

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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.