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Finding the Fourth Proportional to 13,138.86, 19,701.03 and 4,368.99

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Solution

The fourth proportional to 13,138.86, 19,701.03 and 4,368.99 is: 6,551.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.86 : 19,701.03 = 4,368.99 : x
  2. Step 2: Convert to fraction form
    13,138.86/19,701.03 = 4,368.99/x
  3. Step 3: Cross multiply
    13,138.86x = 19,701.03 × 4,368.99
  4. Step 4: Simplify right side
    13,138.86x = 86,073,603.06
  5. Step 5: Solve for x
    x = 86,073,603.06/13,138.86
  6. Step 6: Final answer
    x = 6,551.07

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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.