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Finding the Fourth Proportional to 13,692.51, 18,895.65 and 7,404.87

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Solution

The fourth proportional to 13,692.51, 18,895.65 and 7,404.87 is: 10,218.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,692.51 : 18,895.65 = 7,404.87 : x
  2. Step 2: Convert to fraction form
    13,692.51/18,895.65 = 7,404.87/x
  3. Step 3: Cross multiply
    13,692.51x = 18,895.65 × 7,404.87
  4. Step 4: Simplify right side
    13,692.51x = 139,919,831.82
  5. Step 5: Solve for x
    x = 139,919,831.82/13,692.51
  6. Step 6: Final answer
    x = 10,218.71

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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.