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Finding the Fourth Proportional to 13,691.95, 18,897.93 and 8,903.56

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Solution

The fourth proportional to 13,691.95, 18,897.93 and 8,903.56 is: 12,288.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,691.95 : 18,897.93 = 8,903.56 : x
  2. Step 2: Convert to fraction form
    13,691.95/18,897.93 = 8,903.56/x
  3. Step 3: Cross multiply
    13,691.95x = 18,897.93 × 8,903.56
  4. Step 4: Simplify right side
    13,691.95x = 168,258,853.63
  5. Step 5: Solve for x
    x = 168,258,853.63/13,691.95
  6. Step 6: Final answer
    x = 12,288.89

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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.