Home / 13,342.08-18,412.80-8,630.40

Finding the Fourth Proportional to 13,342.08, 18,412.80 and 8,630.40

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Solution

The fourth proportional to 13,342.08, 18,412.80 and 8,630.40 is: 11,910.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,342.08 : 18,412.80 = 8,630.40 : x
  2. Step 2: Convert to fraction form
    13,342.08/18,412.80 = 8,630.40/x
  3. Step 3: Cross multiply
    13,342.08x = 18,412.80 × 8,630.40
  4. Step 4: Simplify right side
    13,342.08x = 158,909,829.12
  5. Step 5: Solve for x
    x = 158,909,829.12/13,342.08
  6. Step 6: Final answer
    x = 11,910.42

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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.