Home / 12,645.90-17,428.07-10,136.31

Finding the Fourth Proportional to 12,645.90, 17,428.07 and 10,136.31

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Solution

The fourth proportional to 12,645.90, 17,428.07 and 10,136.31 is: 13,969.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,645.90 : 17,428.07 = 10,136.31 : x
  2. Step 2: Convert to fraction form
    12,645.90/17,428.07 = 10,136.31/x
  3. Step 3: Cross multiply
    12,645.90x = 17,428.07 × 10,136.31
  4. Step 4: Simplify right side
    12,645.90x = 176,656,269.54
  5. Step 5: Solve for x
    x = 176,656,269.54/12,645.90
  6. Step 6: Final answer
    x = 13,969.45

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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.