Home / 19,881.95-27,437.79-11,385.59

Finding the Fourth Proportional to 19,881.95, 27,437.79 and 11,385.59

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Solution

The fourth proportional to 19,881.95, 27,437.79 and 11,385.59 is: 15,712.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,881.95 : 27,437.79 = 11,385.59 : x
  2. Step 2: Convert to fraction form
    19,881.95/27,437.79 = 11,385.59/x
  3. Step 3: Cross multiply
    19,881.95x = 27,437.79 × 11,385.59
  4. Step 4: Simplify right side
    19,881.95x = 312,395,290.26
  5. Step 5: Solve for x
    x = 312,395,290.26/19,881.95
  6. Step 6: Final answer
    x = 15,712.51

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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.