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Finding the Fourth Proportional to 13,058.88, 18,019.44 and 7,681.56

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Solution

The fourth proportional to 13,058.88, 18,019.44 and 7,681.56 is: 10,599.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,058.88 : 18,019.44 = 7,681.56 : x
  2. Step 2: Convert to fraction form
    13,058.88/18,019.44 = 7,681.56/x
  3. Step 3: Cross multiply
    13,058.88x = 18,019.44 × 7,681.56
  4. Step 4: Simplify right side
    13,058.88x = 138,417,409.53
  5. Step 5: Solve for x
    x = 138,417,409.53/13,058.88
  6. Step 6: Final answer
    x = 10,599.49

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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.