Home / 12,432.75-17,155.60-8,408.31

Finding the Fourth Proportional to 12,432.75, 17,155.60 and 8,408.31

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Solution

The fourth proportional to 12,432.75, 17,155.60 and 8,408.31 is: 11,602.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,432.75 : 17,155.60 = 8,408.31 : x
  2. Step 2: Convert to fraction form
    12,432.75/17,155.60 = 8,408.31/x
  3. Step 3: Cross multiply
    12,432.75x = 17,155.60 × 8,408.31
  4. Step 4: Simplify right side
    12,432.75x = 144,249,603.04
  5. Step 5: Solve for x
    x = 144,249,603.04/12,432.75
  6. Step 6: Final answer
    x = 11,602.39

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Half scale
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Double scale
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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.