Home / 13,408.08-19,970.28-12,705.52

Finding the Fourth Proportional to 13,408.08, 19,970.28 and 12,705.52

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Solution

The fourth proportional to 13,408.08, 19,970.28 and 12,705.52 is: 18,923.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,408.08 : 19,970.28 = 12,705.52 : x
  2. Step 2: Convert to fraction form
    13,408.08/19,970.28 = 12,705.52/x
  3. Step 3: Cross multiply
    13,408.08x = 19,970.28 × 12,705.52
  4. Step 4: Simplify right side
    13,408.08x = 253,732,791.95
  5. Step 5: Solve for x
    x = 253,732,791.95/13,408.08
  6. Step 6: Final answer
    x = 18,923.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.