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Finding the Fourth Proportional to 12,085.77, 18,129.53 and 5,058.71

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Solution

The fourth proportional to 12,085.77, 18,129.53 and 5,058.71 is: 7,588.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,085.77 : 18,129.53 = 5,058.71 : x
  2. Step 2: Convert to fraction form
    12,085.77/18,129.53 = 5,058.71/x
  3. Step 3: Cross multiply
    12,085.77x = 18,129.53 × 5,058.71
  4. Step 4: Simplify right side
    12,085.77x = 91,712,054.74
  5. Step 5: Solve for x
    x = 91,712,054.74/12,085.77
  6. Step 6: Final answer
    x = 7,588.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.