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Finding the Fourth Proportional to 13,959.92, 19,259.19 and 7,988.39

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Solution

The fourth proportional to 13,959.92, 19,259.19 and 7,988.39 is: 11,020.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,959.92 : 19,259.19 = 7,988.39 : x
  2. Step 2: Convert to fraction form
    13,959.92/19,259.19 = 7,988.39/x
  3. Step 3: Cross multiply
    13,959.92x = 19,259.19 × 7,988.39
  4. Step 4: Simplify right side
    13,959.92x = 153,849,824.51
  5. Step 5: Solve for x
    x = 153,849,824.51/13,959.92
  6. Step 6: Final answer
    x = 11,020.83

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Similar ratio
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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.