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Finding the Fourth Proportional to 13,878.51, 19,129.01 and 10,520.25

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Solution

The fourth proportional to 13,878.51, 19,129.01 and 10,520.25 is: 14,500.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,878.51 : 19,129.01 = 10,520.25 : x
  2. Step 2: Convert to fraction form
    13,878.51/19,129.01 = 10,520.25/x
  3. Step 3: Cross multiply
    13,878.51x = 19,129.01 × 10,520.25
  4. Step 4: Simplify right side
    13,878.51x = 201,241,967.45
  5. Step 5: Solve for x
    x = 201,241,967.45/13,878.51
  6. Step 6: Final answer
    x = 14,500.26

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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.