Home / 13,605.49-18,775.65-7,637.23

Finding the Fourth Proportional to 13,605.49, 18,775.65 and 7,637.23

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Solution

The fourth proportional to 13,605.49, 18,775.65 and 7,637.23 is: 10,539.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,605.49 : 18,775.65 = 7,637.23 : x
  2. Step 2: Convert to fraction form
    13,605.49/18,775.65 = 7,637.23/x
  3. Step 3: Cross multiply
    13,605.49x = 18,775.65 × 7,637.23
  4. Step 4: Simplify right side
    13,605.49x = 143,393,957.45
  5. Step 5: Solve for x
    x = 143,393,957.45/13,605.49
  6. Step 6: Final answer
    x = 10,539.42

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Half scale
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Find fourth proportional to 13,606.49, 18,777.03 and 7,638.23
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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.