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Finding the Fourth Proportional to 13,903.91, 20,837.63 and 12,047.39

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Solution

The fourth proportional to 13,903.91, 20,837.63 and 12,047.39 is: 18,055.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,903.91 : 20,837.63 = 12,047.39 : x
  2. Step 2: Convert to fraction form
    13,903.91/20,837.63 = 12,047.39/x
  3. Step 3: Cross multiply
    13,903.91x = 20,837.63 × 12,047.39
  4. Step 4: Simplify right side
    13,903.91x = 251,038,981.22
  5. Step 5: Solve for x
    x = 251,038,981.22/13,903.91
  6. Step 6: Final answer
    x = 18,055.29

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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.