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Finding the Fourth Proportional to 13,652.60, 18,838.71 and 7,987.05

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Solution

The fourth proportional to 13,652.60, 18,838.71 and 7,987.05 is: 11,021.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,652.60 : 18,838.71 = 7,987.05 : x
  2. Step 2: Convert to fraction form
    13,652.60/18,838.71 = 7,987.05/x
  3. Step 3: Cross multiply
    13,652.60x = 18,838.71 × 7,987.05
  4. Step 4: Simplify right side
    13,652.60x = 150,465,718.71
  5. Step 5: Solve for x
    x = 150,465,718.71/13,652.60
  6. Step 6: Final answer
    x = 11,021.03

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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.