Home / 12,543.54-18,808.59-4,220.79

Finding the Fourth Proportional to 12,543.54, 18,808.59 and 4,220.79

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Solution

The fourth proportional to 12,543.54, 18,808.59 and 4,220.79 is: 6,328.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,543.54 : 18,808.59 = 4,220.79 : x
  2. Step 2: Convert to fraction form
    12,543.54/18,808.59 = 4,220.79/x
  3. Step 3: Cross multiply
    12,543.54x = 18,808.59 × 4,220.79
  4. Step 4: Simplify right side
    12,543.54x = 79,387,108.59
  5. Step 5: Solve for x
    x = 79,387,108.59/12,543.54
  6. Step 6: Final answer
    x = 6,328.92

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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.