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Finding the Fourth Proportional to 13,539, 18,685.98 and 7,948.92

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Solution

The fourth proportional to 13,539, 18,685.98 and 7,948.92 is: 10,970.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,539 : 18,685.98 = 7,948.92 : x
  2. Step 2: Convert to fraction form
    13,539/18,685.98 = 7,948.92/x
  3. Step 3: Cross multiply
    13,539x = 18,685.98 × 7,948.92
  4. Step 4: Simplify right side
    13,539x = 148,533,360.14
  5. Step 5: Solve for x
    x = 148,533,360.14/13,539
  6. Step 6: Final answer
    x = 10,970.78

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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.