Home / 13,559.07-20,331.86-8,638.59

Finding the Fourth Proportional to 13,559.07, 20,331.86 and 8,638.59

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Solution

The fourth proportional to 13,559.07, 20,331.86 and 8,638.59 is: 12,953.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,559.07 : 20,331.86 = 8,638.59 : x
  2. Step 2: Convert to fraction form
    13,559.07/20,331.86 = 8,638.59/x
  3. Step 3: Cross multiply
    13,559.07x = 20,331.86 × 8,638.59
  4. Step 4: Simplify right side
    13,559.07x = 175,638,559.28
  5. Step 5: Solve for x
    x = 175,638,559.28/13,559.07
  6. Step 6: Final answer
    x = 12,953.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.