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Finding the Fourth Proportional to 13,387.17, 18,474.99 and 7,419.51

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Solution

The fourth proportional to 13,387.17, 18,474.99 and 7,419.51 is: 10,239.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.17 : 18,474.99 = 7,419.51 : x
  2. Step 2: Convert to fraction form
    13,387.17/18,474.99 = 7,419.51/x
  3. Step 3: Cross multiply
    13,387.17x = 18,474.99 × 7,419.51
  4. Step 4: Simplify right side
    13,387.17x = 137,075,373.05
  5. Step 5: Solve for x
    x = 137,075,373.05/13,387.17
  6. Step 6: Final answer
    x = 10,239.31

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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.