Home / 21,821.08-30,113.96-12,390.52

Finding the Fourth Proportional to 21,821.08, 30,113.96 and 12,390.52

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Solution

The fourth proportional to 21,821.08, 30,113.96 and 12,390.52 is: 17,099.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,821.08 : 30,113.96 = 12,390.52 : x
  2. Step 2: Convert to fraction form
    21,821.08/30,113.96 = 12,390.52/x
  3. Step 3: Cross multiply
    21,821.08x = 30,113.96 × 12,390.52
  4. Step 4: Simplify right side
    21,821.08x = 373,127,623.66
  5. Step 5: Solve for x
    x = 373,127,623.66/21,821.08
  6. Step 6: Final answer
    x = 17,099.41

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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.